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From Stack <st...@duboce.net>
Subject Re: scanner deadlock?
Date Mon, 12 Sep 2011 16:46:59 GMT
On Sun, Sep 11, 2011 at 2:40 PM, Geoff Hendrey <ghendrey@decarta.com> wrote:
> Hi,
>
> The cluster is definitely loaded. We are running a MR job with 130
> reducers, each using a scanner. Ganglia shows an overall CPU utilization
> of around 40%, with network pushing 800MB/s. The problem may correlate
> with a major_compact I initiated couple days ago. Even today, I still
> see a lot of compacting (continuous) on region servers.
>
> Here is the thread dump from jstack. It does not reveal any explicit
> deadlock. At the time I dumped the jstack, the region server logs are
> reporting "IPC Server handler...ClosedChannelException". As soon as this
> begins occurring, our network throughput, as seen on Ganglia drops from
> 800MB/s down to virtually zero. Then of course there is the cascade of
> failures, eventually leading to the regionservers shutting down.
>


Looking at the thread dump, as you say, few are 'BLOCKED' (There are a
few BLOCKED thread trying to go into a next).  But most are deep in a
next stuck polling looking to read.   If you thread dump a few times
in a row, do any seem to be making progress?  (They may be making
progress but slowly, as you say)

So, is it possible you have a slow datanode in your cluster?  Can you
tell who all are connected too... lsof'ing?  That  might give you a
clue.   Perhaps there is a node with sick disks (check dmesg).  Or
perhaps the machine's nework card is sick?

St.Ack

> I don't see anything unusual in the datanode logs on the same server.
> Just HDFS_READ and HDFS_WRITE for the most part.
>
> jstack here:
> ===================================================================
> 2011-09-11 14:28:52
> Full thread dump OpenJDK 64-Bit Server VM (14.0-b16 mixed mode):
>
> "IPC Client (47) connection to
> doop10.dt.sv4.decarta.com/10.241.8.230:54310 from hroot" daemon prio=10
> tid=0x0000000001492800 nid=0x75cb in Object.wait() [0x0000000047633000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at
> org.apache.hadoop.ipc.Client$Connection.waitForWork(Client.java:676)
>        - locked <0x00002aaaaf680000> (a
> org.apache.hadoop.ipc.Client$Connection)
>        at org.apache.hadoop.ipc.Client$Connection.run(Client.java:719)
>
>   Locked ownable synchronizers:
>        - None
>
> "ResponseProcessor for block blk_2613854253703670198_5032689" daemon
> prio=10 tid=0x0000000001988800 nid=0x75bb runnable [0x0000000046926000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab69337248> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab69337230> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaaf3897930> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at java.io.DataInputStream.readFully(DataInputStream.java:195)
>        at java.io.DataInputStream.readLong(DataInputStream.java:416)
>        at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$PipelineAck.readFie
> lds(DataTransferProtocol.java:120)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$ResponseProcessor.run(D
> FSClient.java:2638)
>
>   Locked ownable synchronizers:
>        - None
>
> "DataStreamer for file
> /hbase-20.6/NAM_CLUSTERKEYS3/60db9e0113c7578ed913dc37e0856954/.tmp/42977
> 03314038441248 block blk_2613854253703670198_5032689" daemon prio=10
> tid=0x00002aae40e8e800 nid=0x75b8 in Object.wait() [0x0000000046e2b000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSCli
> ent.java:2483)
>        - locked <0x00002aab6551a2d8> (a java.util.LinkedList)
>
>   Locked ownable synchronizers:
>        - None
>
> "ResponseProcessor for block blk_8900384789253382699_5032549" daemon
> prio=10 tid=0x00000000013cd000 nid=0x71d0 runnable [0x0000000047431000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaae0569530> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaae0569518> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaadb4c5c68> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at java.io.DataInputStream.readFully(DataInputStream.java:195)
>        at java.io.DataInputStream.readLong(DataInputStream.java:416)
>        at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$PipelineAck.readFie
> lds(DataTransferProtocol.java:120)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$ResponseProcessor.run(D
> FSClient.java:2638)
>
>   Locked ownable synchronizers:
>        - None
>
> "DataStreamer for file
> /hbase-20.6/.logs/doop5.dt.sv4.decarta.com,60020,1315768059645/doop5.dt.
> sv4.decarta.com%3A60020.1315776307423 block
> blk_8900384789253382699_5032549" daemon prio=10 tid=0x00000000016c3800
> nid=0x71c8 in Object.wait() [0x000000004712e000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSCli
> ent.java:2483)
>        - locked <0x00002aab092a7f38> (a java.util.LinkedList)
>
>   Locked ownable synchronizers:
>        - None
>
> "Attach Listener" daemon prio=10 tid=0x0000000001e32000 nid=0x50f4
> waiting on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_CLOSE_REGION-doop5.dt.sv4.decarta.com,60020,1315768059645-2" daemon
> prio=10 tid=0x00000000018cb800 nid=0x505 waiting on condition
> [0x0000000047330000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcefb428> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_CLOSE_REGION-doop5.dt.sv4.decarta.com,60020,1315768059645-1" daemon
> prio=10 tid=0x000000000163e000 nid=0x504 waiting on condition
> [0x0000000047532000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcefb428> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_CLOSE_REGION-doop5.dt.sv4.decarta.com,60020,1315768059645-0" daemon
> prio=10 tid=0x0000000001bff800 nid=0x503 waiting on condition
> [0x0000000046f2c000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcefb428> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "sendParams-6" daemon prio=10 tid=0x00002aae401f1800 nid=0x6d3b waiting
> on condition [0x000000004702d000]
>   java.lang.Thread.State: TIMED_WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabceea260> (a
> java.util.concurrent.SynchronousQueue$TransferStack)
>        at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
>        at
> java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(Synchro
> nousQueue.java:453)
>        at
> java.util.concurrent.SynchronousQueue$TransferStack.transfer(Synchronous
> Queue.java:352)
>        at
> java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:903)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_OPEN_REGION-doop5.dt.sv4.decarta.com,60020,1315768059645-2" daemon
> prio=10 tid=0x0000000001a7f000 nid=0x5b56 waiting on condition
> [0x0000000046d2a000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcefb2e8> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_OPEN_REGION-doop5.dt.sv4.decarta.com,60020,1315768059645-1" daemon
> prio=10 tid=0x0000000001af2800 nid=0x5b55 waiting on condition
> [0x0000000042deb000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcefb2e8> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_OPEN_REGION-doop5.dt.sv4.decarta.com,60020,1315768059645-0" daemon
> prio=10 tid=0x00000000014b3800 nid=0x5b54 waiting on condition
> [0x0000000046c29000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcefb2e8> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "RS_OPEN_ROOT-doop5.dt.sv4.decarta.com,60020,1315768059645-0" daemon
> prio=10 tid=0x0000000001ad2800 nid=0x556e waiting on condition
> [0x0000000046a27000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabcee8870> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "LRU Statistics #0" prio=10 tid=0x00002aae4048a800 nid=0x5566 waiting on
> condition [0x0000000046825000]
>   java.lang.Thread.State: TIMED_WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabd0695c0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> aitNanos(AbstractQueuedSynchronizer.java:2081)
>        at java.util.concurrent.DelayQueue.take(DelayQueue.java:193)
>        at
> java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(S
> cheduledThreadPoolExecutor.java:688)
>        at
> java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(S
> cheduledThreadPoolExecutor.java:681)
>        at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:
> 1043)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1103)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "LruBlockCache.EvictionThread" daemon prio=10 tid=0x00002aae4049f800
> nid=0x5565 in Object.wait() [0x0000000046724000]
>   java.lang.Thread.State: WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.lang.Object.wait(Object.java:502)
>        at
> org.apache.hadoop.hbase.io.hfile.LruBlockCache$EvictionThread.run(LruBlo
> ckCache.java:519)
>        - locked <0x00002aaabce92f50> (a
> org.apache.hadoop.hbase.io.hfile.LruBlockCache$EvictionThread)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 9 on 60020" daemon prio=10
> tid=0x00002aae4057e000 nid=0x5564 waiting on condition
> [0x0000000046623000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 8 on 60020" daemon prio=10
> tid=0x00002aae4057c800 nid=0x5563 waiting on condition
> [0x0000000046522000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 7 on 60020" daemon prio=10
> tid=0x00002aae40559000 nid=0x5562 waiting on condition
> [0x0000000046421000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 6 on 60020" daemon prio=10
> tid=0x00002aae40557800 nid=0x5561 waiting on condition
> [0x0000000046320000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 5 on 60020" daemon prio=10
> tid=0x00002aae40555800 nid=0x5560 waiting on condition
> [0x000000004621f000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 4 on 60020" daemon prio=10
> tid=0x00002aae40553800 nid=0x555f waiting on condition
> [0x000000004611e000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 3 on 60020" daemon prio=10
> tid=0x00002aae4054f000 nid=0x555e waiting on condition
> [0x000000004601d000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 2 on 60020" daemon prio=10
> tid=0x00000000012f8800 nid=0x555d waiting on condition
> [0x0000000045f1c000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 1 on 60020" daemon prio=10
> tid=0x0000000001991000 nid=0x555c waiting on condition
> [0x0000000045e1b000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "PRI IPC Server handler 0 on 60020" daemon prio=10
> tid=0x000000000198e800 nid=0x555b waiting on condition
> [0x0000000045d1a000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb307e0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:102
> 5)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 29 on 60020" daemon prio=10 tid=0x000000000198c800
> nid=0x555a runnable [0x0000000045c18000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aac053b8450> (a sun.nio.ch.Util$1)
>        - locked <0x00002aac053b8438> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab1037afc8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aac92976a30> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aabc43be0a8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aabc43be0a8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aabc43be0a8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aac1a4e0ea8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aac1a4e0ea8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aac237c37a8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aad39485080> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab0b5ba8a8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aab89f59aa8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aab016d6988> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aab016d6988> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 28 on 60020" daemon prio=10 tid=0x0000000001864000
> nid=0x5559 runnable [0x0000000045b17000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aabaedb0608> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabaedb05f0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaca096fa50> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aac62a70b28> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aab856e6220> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aab856e6220> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aab856e6220> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab0264afe8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab0264afe8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aaae070be48> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac18961940> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aabad8605d0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aab077e5d80> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aad30d57c18> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aad30d57c18> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 27 on 60020" daemon prio=10 tid=0x0000000001862000
> nid=0x5558 runnable [0x0000000045a16000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab2ea61b70> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab2ea61b88> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aacbb364578> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aab1ffc0d00> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad890f4640> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad890f4640> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad890f4640> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaba1282b10> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaba1282b10> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aac528d15d0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aaaaf68a630> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aabc5c948b8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:115)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aab95832718> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aab95832718> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aab28d7de90> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aab28d7de90> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 26 on 60020" daemon prio=10 tid=0x0000000001860000
> nid=0x5557 runnable [0x0000000045915000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aabaaa6b808> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabaaa6b7f0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaaf3899ca8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aaac1f59118> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aaac0e99db0> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aaac0e99db0> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aaac0e99db0> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aabb7221e88> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aabb7221e88> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aac28621da0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac18962690> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab6876b850> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.loadBlock(HFile.ja
> va:1447)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.reseekTo(HFile.jav
> a:1325)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(St
> oreFileScanner.java:152)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:110)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aaabe3468f8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aaabe3468f8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aac8e37dbc8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aac8e37dbc8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 25 on 60020" daemon prio=10 tid=0x000000000173d800
> nid=0x5556 runnable [0x0000000045814000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab20178510> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab20178528> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaad6187af0> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aac891a6610> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aac1de6d9f8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aac1de6d9f8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aac1de6d9f8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaac041c6c8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaac041c6c8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab25e717e0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac3e6e4e28> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aaad4a425f0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aaabd5eb7e0> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aac8e37dc68> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aac8e37dc68> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 24 on 60020" daemon prio=10 tid=0x000000000173a000
> nid=0x5555 waiting for monitor entry [0x0000000045714000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - waiting to lock <0x00002aab016d6618> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 23 on 60020" daemon prio=10 tid=0x0000000001444000
> nid=0x5554 runnable [0x0000000045612000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aad70044d30> (a sun.nio.ch.Util$1)
>        - locked <0x00002aad70044d48> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab328f1a40> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aaac9d48e68> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aac1de6dd40> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aac1de6dd40> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aac1de6dd40> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab39d88148> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab39d88148> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab7addd0d8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab2811e8e8> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aabe56e8858> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aad15b7d360> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabc7a3d258> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabc7a3d258> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 22 on 60020" daemon prio=10 tid=0x0000000001442000
> nid=0x5553 runnable [0x0000000045511000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aabf6e38450> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabf6e38468> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aabb9e99468> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aaae13c0340> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad427a91c0> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad427a91c0> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad427a91c0> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab7c7ca0c8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab7c7ca0c8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab3748f1a8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab52d56ed8> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab60a86ca8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(St
> oreFileScanner.java:158)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:110)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aab706a3e98> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aab706a3e98> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aaae3489758> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aaae3489758> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 21 on 60020" daemon prio=10 tid=0x0000000001792000
> nid=0x5552 waiting for monitor entry [0x0000000045411000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - waiting to lock <0x00002aabc7a3d3e8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 20 on 60020" daemon prio=10 tid=0x000000000178e000
> nid=0x5551 runnable [0x000000004530f000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab3745e018> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab3745e030> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab7d5cc0c0> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aac035e4990> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad890f42f8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad890f42f8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad890f42f8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab1baffa50> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab1baffa50> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aaadef99fe8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac189625a0> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aabb88c7ce0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:115)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aaadfa95ec0> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aaadfa95ec0> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabf6832658> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabf6832658> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 19 on 60020" daemon prio=10 tid=0x0000000001b19800
> nid=0x5550 runnable [0x000000004520e000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab94af3848> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab94af3830> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aac6ed3e1d8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aaac1194578> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad890f2600> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad890f2600> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad890f2600> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaae78be750> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaae78be750> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aabba906cc0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac18963ef0> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aaacd2974c0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:115)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aab328ec218> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aab328ec218> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabbaf1c898> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabbaf1c898> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 18 on 60020" daemon prio=10 tid=0x0000000001b17800
> nid=0x554f runnable [0x000000004510d000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaae98101b0> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaae9810198> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaaeba1b040> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aab1ac7d288> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad890f0db8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad890f0db8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad890f0db8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab8c671d30> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab8c671d30> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab8c4f3de0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac18963dd0> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab8d9fd7c8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:115)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aaba69901b8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aaba69901b8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabbaf1e468> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabbaf1e468> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 17 on 60020" daemon prio=10 tid=0x0000000001b15800
> nid=0x554e runnable [0x000000004500c000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaac2d0d348> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaac2d0d330> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aacbb364b18> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aaac2750e38> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aaac1028128> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aaac1028128> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aaac1028128> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaae41f13d8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaae41f13d8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab3c08c348> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab52d54ef8> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aac0cb261b0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aaabefb9c10> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aad30d56688> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aad30d56688> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 16 on 60020" daemon prio=10 tid=0x00000000013fa000
> nid=0x554d runnable [0x0000000044f0b000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aabec61aa08> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabec61a9f0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaae7590720> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aacf2246cb0> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad06dd2c70> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad06dd2c70> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad06dd2c70> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aabe38abcd8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aabe38abcd8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aaad08ca208> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac189636e0> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab84fe43c8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(St
> oreFileScanner.java:158)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:110)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aad072dbd30> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aad072dbd30> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabdbaa0490> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabdbaa0490> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 15 on 60020" daemon prio=10 tid=0x00000000013f7800
> nid=0x554c runnable [0x0000000044e0a000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aac558cde50> (a sun.nio.ch.Util$1)
>        - locked <0x00002aac558cde38> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aac5cd41558> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aadcf530468> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad427a97a8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad427a97a8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad427a97a8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab9410bc00> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab9410bc00> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aaca7cfcf70> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aacf952a6c8> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aaac4472350> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :297)
>        - locked <0x00002aaaefe12070> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabbaf1d1a8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabbaf1d1a8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 14 on 60020" daemon prio=10 tid=0x00000000013f5800
> nid=0x554b runnable [0x0000000044d09000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab28f91848> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab28f91860> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaaf5031970> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aacec8cf590> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aaaf789b048> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aaaf789b048> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aaaf789b048> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab9c1df470> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab9c1df470> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab7ec60418> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab44c84dd8> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab227a2dc8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(St
> oreFileScanner.java:158)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:110)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aab50d25f28> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aab50d25f28> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aaae9efd9f0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aaae9efd9f0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 13 on 60020" daemon prio=10 tid=0x0000000001b61800
> nid=0x554a waiting for monitor entry [0x0000000044c09000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - waiting to lock <0x00002aacc684dad0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 12 on 60020" daemon prio=10 tid=0x0000000001b5f800
> nid=0x5549 runnable [0x0000000044b07000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab618bb060> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabe1d82718> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab76896238> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aab016dc128> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad03182340> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad03182340> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad03182340> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab8b32e3e0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab8b32e3e0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab8b436170> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aacd4fb8038> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab8b4b4908> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aab480f55b8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aaae9efdb30> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aaae9efdb30> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 11 on 60020" daemon prio=10 tid=0x0000000001b5d000
> nid=0x5548 waiting for monitor entry [0x0000000044a07000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - waiting to lock <0x00002aacc684dad0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 10 on 60020" daemon prio=10 tid=0x000000000196a800
> nid=0x5547 runnable [0x0000000044905000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aad7443dcd8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aad7a31cb00> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aac9067d2d8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aad5103b0a0> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aadc79059c8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aadc79059c8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aadc79059c8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aabf0f472b0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aabf0f472b0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab8b2b29b0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aad0477a310> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aabb7b16fd0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aab59165e10> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aac8e37dd58> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aac8e37dd58> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 9 on 60020" daemon prio=10 tid=0x0000000001968000
> nid=0x5546 waiting for monitor entry [0x0000000044805000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.isFilterDone(
> HRegion.java:2324)
>        - waiting to lock <0x00002aacc684dad0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1850)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 8 on 60020" daemon prio=10 tid=0x0000000001967000
> nid=0x5545 runnable [0x0000000044703000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aabb0b7b868> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabb0b7b880> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaac79442c8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aad0106a6b0> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aac108e6768> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aac108e6768> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aac108e6768> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aac4d4ecd40> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aac4d4ecd40> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aaad20c3b08> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac536bda88> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aaadfc86320> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.loadBlock(HFile.ja
> va:1447)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.reseekTo(HFile.jav
> a:1325)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(St
> oreFileScanner.java:152)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:110)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aad072dc1c8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aad072dc1c8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aac8e37d808> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aac8e37d808> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 7 on 60020" daemon prio=10 tid=0x00000000016de800
> nid=0x5544 runnable [0x0000000044602000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab9f4dc588> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab9f4dc570> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aac6ed3e250> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aad003a0178> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aabbd698ec8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aabbd698ec8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aabbd698ec8> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaad91ecfa8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaad91ecfa8> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aac237c5090> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aad65d9a7f0> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aaaccc5d6c8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aad15b7d2b8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aacc684dad0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aacc684dad0> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 6 on 60020" daemon prio=10 tid=0x00000000016dd000
> nid=0x5543 runnable [0x0000000044501000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaaf7db82f0> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaaf7db82d8> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab6f3339a8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aab494cdcb8> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aad890f5018> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aad890f5018> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aad890f5018> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaae4d56928> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaae4d56928> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aaae8d98798> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aaaaf686f40> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aaae77f0ad8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aaae4cd85a0> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aad30d55d28> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aad30d55d28> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 5 on 60020" daemon prio=10 tid=0x000000000194c800
> nid=0x5542 runnable [0x0000000044400000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaac5bf0ff0> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaac5bf10c8> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab0492d6d8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aac451e5d20> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 89)
>        - locked <0x00002aabf9312408> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aabf9312408> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aabf9312408> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aab78dc6068> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aab78dc6068> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab14390138> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab7fbb83e8> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aac2cbf46c8> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileSc
> anner.java:115)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.ja
> va:255)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.ja
> va:394)
>        - locked <0x00002aad15b7da98> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :293)
>        - locked <0x00002aad15b7da98> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabc7a3d3e8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabc7a3d3e8> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 4 on 60020" daemon prio=10 tid=0x000000000194a800
> nid=0x5541 runnable [0x00000000442ff000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aabbae85af8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aabbae85b10> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaae379da00> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aac7ecf9bb8> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aaacf49d528> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aaacf49d528> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aaacf49d528> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aabdc652620> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aabdc652620> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aac357f4350> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab9fc22a58> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aabdbefbe20> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aad97b3b7e8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aab016d6618> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aab016d6618> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 3 on 60020" daemon prio=10 tid=0x00000000019c4000
> nid=0x5540 waiting for monitor entry [0x00000000441ff000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - waiting to lock <0x00002aab28d7de90> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 2 on 60020" daemon prio=10 tid=0x00000000019c2000
> nid=0x553f runnable [0x00000000440fd000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaaeef929f8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaaeef92a10> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaaffd9ef38> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aab2ac42300> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aabc43bef18> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aabc43bef18> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aabc43bef18> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aabd53c1d58> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aabd53c1d58> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aabb602a180> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aab44c85f18> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aac0d2be0b0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aab4eb7a680> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aabc7a3cc68> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aabc7a3cc68> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 1 on 60020" daemon prio=10 tid=0x0000000001535800
> nid=0x553e runnable [0x0000000043ffc000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aad28449198> (a sun.nio.ch.Util$1)
>        - locked <0x00002aad284491b0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aab3a682700> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aac5b5cbd28> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aabc43bd778> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aabc43bd778> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aabc43bd778> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aac4d4f9b90> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aac4d4f9b90> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aac500ac780> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aabe2211268> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aac537126f0> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :262)
>        - locked <0x00002aadb912fca8> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :114)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(
> HRegion.java:2344)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2301)
>        - locked <0x00002aadcba8fe98> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - locked <0x00002aadcba8fe98> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server handler 0 on 60020" daemon prio=10 tid=0x0000000001534000
> nid=0x553d waiting for monitor entry [0x0000000043efc000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.
> java:2317)
>        - waiting to lock <0x00002aabc7a3d258> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.ja
> va:1832)
>        at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:616)
>        at
> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:103
> 9)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server listener on 60020" daemon prio=10 tid=0x00002aae4054e000
> nid=0x553c runnable [0x0000000043dfb000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabc18bdf8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabc18bde0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb1ced8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener.run(HBaseServer.java:41
> 4)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Server Responder" daemon prio=10 tid=0x00002aae4053d800 nid=0x553b
> runnable [0x0000000043cfa000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabc2ceed8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabc2ceef0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb33fa8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Responder.run(HBaseServer.java:5
> 88)
>
>   Locked ownable synchronizers:
>        - None
>
> "Timer-0" daemon prio=10 tid=0x00002aae4053c800 nid=0x553a in
> Object.wait() [0x0000000043bf9000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.util.TimerThread.mainLoop(Timer.java:531)
>        - locked <0x00002aaabd062850> (a java.util.TaskQueue)
>        at java.util.TimerThread.run(Timer.java:484)
>
>   Locked ownable synchronizers:
>        - None
>
> "983053578@qtp-1891789590-1 - Acceptor0
> SelectChannelConnector@0.0.0.0:60030" prio=10 tid=0x00002aae40381000
> nid=0x5539 runnable [0x0000000043af8000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabd07c460> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabd07c478> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb26b78> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.ja
> va:498)
>        at
> org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:192)
>        at
> org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnect
> or.java:124)
>        at
> org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:
> 708)
>        at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java
> :582)
>
>   Locked ownable synchronizers:
>        - None
>
> "1148428095@qtp-1891789590-0" prio=10 tid=0x00002aae403d2000 nid=0x5538
> in Object.wait() [0x00000000439f7000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java
> :626)
>        - locked <0x00002aaabbc4c8f0> (a
> org.mortbay.thread.QueuedThreadPool$PoolThread)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020.leaseChecker" daemon prio=10 tid=0x00002aae402ee800
> nid=0x5537 waiting for monitor entry [0x00000000438f6000]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.close(HRegion
> .java:2409)
>        - waiting to lock <0x00002aadcba8fe98> (a
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer$ScannerListener.lease
> Expired(HRegionServer.java:1892)
>        at
> org.apache.hadoop.hbase.regionserver.Leases.run(Leases.java:99)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020.majorCompactionChecker" daemon prio=10
> tid=0x00002aae402ec800 nid=0x5536 in Object.wait() [0x00000000437f5000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        - waiting on <0x00002aaabc1f7bf0> (a java.lang.Object)
>        at org.apache.hadoop.hbase.util.Sleeper.sleep(Sleeper.java:91)
>        - locked <0x00002aaabc1f7bf0> (a java.lang.Object)
>        at org.apache.hadoop.hbase.Chore.run(Chore.java:74)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020.compactor" daemon prio=10 tid=0x00002aae402eb000
> nid=0x5535 runnable [0x00000000436f4000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aab26f462e0> (a sun.nio.ch.Util$1)
>        - locked <0x00002aab26f462c8> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaaeba1ac80> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWi
> thTimeout.java:332)
>        at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:
> 157)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>        at
> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>        at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>        - locked <0x00002aab44c85258> (a java.io.BufferedInputStream)
>        at java.io.DataInputStream.readInt(DataInputStream.java:387)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.readChunk(DFSClient.java:13
> 50)
>        - locked <0x00002aaac6caf140> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.jav
> a:237)
>        at
> org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:189)
>        at
> org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:158)
>        - locked <0x00002aaac6caf140> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$BlockReader.read(DFSClient.java:1249)
>        - locked <0x00002aaac6caf140> (a
> org.apache.hadoop.hdfs.DFSClient$BlockReader)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.readBuffer(DFSClient.jav
> a:1899)
>        - locked <0x00002aaabd63fbb0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1951
> )
>        - locked <0x00002aaabd63fbb0> (a
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
>        at java.io.DataInputStream.read(DataInputStream.java:149)
>        at
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(Bounde
> dRangeFileInputStream.java:105)
>        - locked <0x00002aab21b4e148> (a
> org.apache.hadoop.hdfs.DFSClient$DFSDataInputStream)
>        at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
>        at
> java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>        - locked <0x00002aaaaedc39d0> (a java.io.BufferedInputStream)
>        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094
> )
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
>        - locked <0x00002aab458cc280> (a [B)
>        at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:12
> 76)
>        at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScan
> ner.java:87)
>        at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java
> :82)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :297)
>        - locked <0x00002aaace390ec0> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java
> :326)
>        - locked <0x00002aaace390ec0> (a
> org.apache.hadoop.hbase.regionserver.StoreScanner)
>        at
> org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:927)
>        at
> org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:733)
>        - locked <0x00002aaacd20e840> (a java.lang.Object)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:
> 769)
>        at
> org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:
> 714)
>        at
> org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(CompactSplit
> Thread.java:81)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabce779f8> (a
> java.util.concurrent.locks.ReentrantLock$NonfairSync)
>
> "regionserver60020.cacheFlusher" daemon prio=10 tid=0x00002aae402d1800
> nid=0x5534 waiting on condition [0x00000000435f3000]
>   java.lang.Thread.State: TIMED_WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabc241a10> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> aitNanos(AbstractQueuedSynchronizer.java:2081)
>        at java.util.concurrent.DelayQueue.poll(DelayQueue.java:230)
>        at java.util.concurrent.DelayQueue.poll(DelayQueue.java:68)
>        at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher
> .java:216)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020.logRoller" daemon prio=10 tid=0x00002aae402d1000
> nid=0x5533 in Object.wait() [0x00000000434f2000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at
> org.apache.hadoop.hbase.regionserver.LogRoller.run(LogRoller.java:78)
>        - locked <0x00002aaabcec18e0> (a
> java.util.concurrent.atomic.AtomicBoolean)
>
>   Locked ownable synchronizers:
>        - None
>
> "Timer thread for monitoring jvm" daemon prio=10 tid=0x00002aae402b4000
> nid=0x5532 in Object.wait() [0x00000000433f1000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.util.TimerThread.mainLoop(Timer.java:531)
>        - locked <0x00002aaabcedce48> (a java.util.TaskQueue)
>        at java.util.TimerThread.run(Timer.java:484)
>
>   Locked ownable synchronizers:
>        - None
>
> "Timer thread for monitoring hbase" daemon prio=10
> tid=0x00002aae402b2800 nid=0x5531 in Object.wait() [0x00000000432f0000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.util.TimerThread.mainLoop(Timer.java:531)
>        - locked <0x00002aaabceca148> (a java.util.TaskQueue)
>        at java.util.TimerThread.run(Timer.java:484)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020.logSyncer" daemon prio=10 tid=0x00002aae402b1000
> nid=0x5530 waiting on condition [0x00000000431ef000]
>   java.lang.Thread.State: TIMED_WAITING (sleeping)
>        at java.lang.Thread.sleep(Native Method)
>        at
> org.apache.hadoop.hbase.regionserver.wal.HLog$LogSyncer.run(HLog.java:96
> 3)
>
>   Locked ownable synchronizers:
>        - None
>
> "LeaseChecker" daemon prio=10 tid=0x00002aae4019a800 nid=0x552f
> sleeping[0x00000000430ee000]
>   java.lang.Thread.State: TIMED_WAITING (sleeping)
>        at java.lang.Thread.sleep(Native Method)
>        at
> org.apache.hadoop.hdfs.DFSClient$LeaseChecker.run(DFSClient.java:1167)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Client (47) connection to
> doop10.dt.sv4.decarta.com/10.241.8.230:60000 from an unknown user"
> daemon prio=10 tid=0x00000000015c9800 nid=0x5528 in Object.wait()
> [0x0000000042cea000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at
> org.apache.hadoop.hbase.ipc.HBaseClient$Connection.waitForWork(HBaseClie
> nt.java:431)
>        - locked <0x00002aaabc24dfc0> (a
> org.apache.hadoop.hbase.ipc.HBaseClient$Connection)
>        at
> org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:
> 476)
>
>   Locked ownable synchronizers:
>        - None
>
> "DestroyJavaVM" prio=10 tid=0x00002aae4015c800 nid=0x54fa waiting on
> condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020-EventThread" daemon prio=10 tid=0x00000000015c5000
> nid=0x5526 waiting on condition [0x0000000042be9000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabc241a60> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020-SendThread(doop3.dt.sv4.decarta.com:2181)" daemon
> prio=10 tid=0x0000000001486800 nid=0x5525 runnable [0x0000000042ae8000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb3e538> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb3e550> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb1db08> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1107)
>
>   Locked ownable synchronizers:
>        - None
>
> "regionserver60020" prio=10 tid=0x00002aae40187000 nid=0x5523 waiting on
> condition [0x000000004028d000]
>   java.lang.Thread.State: TIMED_WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabc2faea0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> aitNanos(AbstractQueuedSynchronizer.java:2081)
>        at
> java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:4
> 23)
>        at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.jav
> a:621)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - None
>
> "Timer thread for monitoring rpc" daemon prio=10 tid=0x00002aae40135800
> nid=0x5522 in Object.wait() [0x00000000429e7000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.util.TimerThread.mainLoop(Timer.java:531)
>        - locked <0x00002aaabbb3cb08> (a java.util.TaskQueue)
>        at java.util.TimerThread.run(Timer.java:484)
>
>   Locked ownable synchronizers:
>        - None
>
> "IPC Reader 9 on port 60020" prio=10 tid=0x00002aae40133000 nid=0x5521
> runnable [0x00000000428e6000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb010a8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb010c0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb1e198> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb250e8> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb4b008> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 8 on port 60020" prio=10 tid=0x00002aae40118000 nid=0x5520
> runnable [0x00000000427e5000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb16118> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb16130> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb144f8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb30308> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb32888> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 7 on port 60020" prio=10 tid=0x00002aae400fd000 nid=0x551f
> runnable [0x00000000426e4000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb2a228> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb2a240> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb28ab8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb2a6d8> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb4a068> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 6 on port 60020" prio=10 tid=0x00002aae400e2800 nid=0x551e
> runnable [0x00000000425e3000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb27028> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb27040> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb258b8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb282e8> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb4fc98> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 5 on port 60020" prio=10 tid=0x00002aae400c7800 nid=0x551d
> runnable [0x00000000413e5000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb2ea08> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb2ea20> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb2d298> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb50c38> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb523a8> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 4 on port 60020" prio=10 tid=0x00002aae400ac800 nid=0x551c
> runnable [0x00000000412e4000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb2aea8> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb2aec0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb1ca28> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb2c168> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb48128> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 3 on port 60020" prio=10 tid=0x00002aae40091800 nid=0x551b
> runnable [0x00000000411e3000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb15c68> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb15c80> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb12d88> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb165c8> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb30ad8> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 2 on port 60020" prio=10 tid=0x00002aae40077000 nid=0x551a
> runnable [0x00000000410e2000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb3d148> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb3d160> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb33828> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb3ebd8> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb40028> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 1 on port 60020" prio=10 tid=0x00002aae4005d000 nid=0x5519
> runnable [0x0000000040fe1000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb15c98> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb15cb0> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb12e00> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb165f0> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb30b28> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "IPC Reader 0 on port 60020" prio=10 tid=0x00002aae40003000 nid=0x5518
> runnable [0x0000000040ee0000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb16148> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb16160> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb14570> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
>        at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.
> java:305)
>        - locked <0x00002aaabbb30330> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
>        at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav
> a:1110)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
> va:603)
>        at java.lang.Thread.run(Thread.java:636)
>
>   Locked ownable synchronizers:
>        - <0x00002aaabbb328d8> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
>
> "main-EventThread" daemon prio=10 tid=0x00002aae3c1b6000 nid=0x5513
> waiting on condition [0x00000000424e2000]
>   java.lang.Thread.State: WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00002aaabbb16618> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
>        at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
> ait(AbstractQueuedSynchronizer.java:2043)
>        at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:3
> 86)
>        at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502)
>
>   Locked ownable synchronizers:
>        - None
>
> "main-SendThread(doop7.dt.sv4.decarta.com:2181)" daemon prio=10
> tid=0x00002aae3c11b000 nid=0x5512 runnable [0x00000000423e1000]
>   java.lang.Thread.State: RUNNABLE
>        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:230)
>        at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
>        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>        - locked <0x00002aaabbb16178> (a sun.nio.ch.Util$1)
>        - locked <0x00002aaabbb16190> (a
> java.util.Collections$UnmodifiableSet)
>        - locked <0x00002aaabbb145e8> (a sun.nio.ch.EPollSelectorImpl)
>        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>        at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1107)
>
>   Locked ownable synchronizers:
>        - None
>
> "Low Memory Detector" daemon prio=10 tid=0x000000000126c800 nid=0x5510
> runnable [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "CompilerThread1" daemon prio=10 tid=0x000000000126a800 nid=0x550f
> waiting on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "CompilerThread0" daemon prio=10 tid=0x0000000001266000 nid=0x550e
> waiting on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "Signal Dispatcher" daemon prio=10 tid=0x0000000001264000 nid=0x550d
> runnable [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "Surrogate Locker Thread (CMS)" daemon prio=10 tid=0x0000000001262000
> nid=0x550c waiting on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
>   Locked ownable synchronizers:
>        - None
>
> "Finalizer" daemon prio=10 tid=0x000000000123b800 nid=0x550b in
> Object.wait() [0x00000000422e0000]
>   java.lang.Thread.State: WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133)
>        - locked <0x00002aaabbb15cf8> (a
> java.lang.ref.ReferenceQueue$Lock)
>        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149)
>        at
> java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177)
>
>   Locked ownable synchronizers:
>        - None
>
> "Reference Handler" daemon prio=10 tid=0x0000000001239800 nid=0x550a in
> Object.wait() [0x00000000421df000]
>   java.lang.Thread.State: WAITING (on object monitor)
>        at java.lang.Object.wait(Native Method)
>        at java.lang.Object.wait(Object.java:502)
>        at
> java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
>        - locked <0x00002aaabbb16d98> (a java.lang.ref.Reference$Lock)
>
>   Locked ownable synchronizers:
>        - None
>
> "VM Thread" prio=10 tid=0x0000000001234800 nid=0x5509 runnable
>
> "Gang worker#0 (Parallel GC Threads)" prio=10 tid=0x0000000000fe9000
> nid=0x54fb runnable
>
> "Gang worker#1 (Parallel GC Threads)" prio=10 tid=0x0000000000feb000
> nid=0x54fc runnable
>
> "Gang worker#2 (Parallel GC Threads)" prio=10 tid=0x0000000000fec800
> nid=0x54fd runnable
>
> "Gang worker#3 (Parallel GC Threads)" prio=10 tid=0x0000000000fee800
> nid=0x54fe runnable
>
> "Gang worker#4 (Parallel GC Threads)" prio=10 tid=0x0000000000ff0800
> nid=0x54ff runnable
>
> "Gang worker#5 (Parallel GC Threads)" prio=10 tid=0x0000000000ff2000
> nid=0x5500 runnable
>
> "Gang worker#6 (Parallel GC Threads)" prio=10 tid=0x0000000000ff4000
> nid=0x5501 runnable
>
> "Gang worker#7 (Parallel GC Threads)" prio=10 tid=0x0000000000ff6000
> nid=0x5502 runnable
>
> "Gang worker#8 (Parallel GC Threads)" prio=10 tid=0x0000000000ff7800
> nid=0x5503 runnable
>
> "Gang worker#9 (Parallel GC Threads)" prio=10 tid=0x0000000000ff9800
> nid=0x5504 runnable
>
> "Concurrent Mark-Sweep GC Thread" prio=10 tid=0x00000000010f4000
> nid=0x5508 runnable
> "Gang worker#0 (Parallel CMS Threads)" prio=10 tid=0x00000000010ee000
> nid=0x5505 runnable
>
> "Gang worker#1 (Parallel CMS Threads)" prio=10 tid=0x00000000010f0000
> nid=0x5506 runnable
>
> "Gang worker#2 (Parallel CMS Threads)" prio=10 tid=0x00000000010f2000
> nid=0x5507 runnable
>
> "VM Periodic Task Thread" prio=10 tid=0x000000000126f800 nid=0x5511
> waiting on condition
>
> JNI global references: 906
>
>
> -----Original Message-----
> From: saint.ack@gmail.com [mailto:saint.ack@gmail.com] On Behalf Of
> Stack
> Sent: Sunday, September 11, 2011 2:27 PM
> To: user@hbase.apache.org
> Subject: Re: scanner deadlock?
>
> 0.90.4 fixes two deadlocks (HBASE-4101 and HBASE-4077).  Since then,
> there is HBASE-4367 (Which has a posted patch).
>
> Below sounds like slowness.   Can you thread dump the particular
> regionserver and see what its up to?  Is there other loading on the
> system at the time?  For example, loading on hdfs?  Anything in the
> hdfs logs for the datanode running beside the slow regionserver?
>
> St.Ack
>
> On Sat, Sep 10, 2011 at 5:50 PM, Geoff Hendrey <ghendrey@decarta.com>
> wrote:
>> Hi all -
>>
>>
>>
>> I'm still dealing with the saga of ScannerTimeoutException,
>> UnknownScannerException, etc. I rewrote my code, in the hope that
> simply
>> a different approach and some different code paths might yield better
>> results. No change. I tried many variations (caching 1 row vs caching
>> many rows, changing the regionserver's lease, increasing the number of
>> allowed zookeeper connections, etc). I created a fresh table on the
>> thought that maybe there was some problem with the table...no change.
>>
>>
>>
>> I am dealing with what appears to be some sort of scanner deadlock. I
>> have a total order partitioned mapreduce job. In the reducer, as long
> as
>> I use just one reducer, the task finishes quickly. But as soon as more
>> than one reducer opens a scanner, the tasks procede in what I would
> call
>> a "jittery" lock step. They both are able to do ResultScanner.next() a
>> few times, but then the call to next() freezes for a long period, and
>> ScannerTimeoutException. I catch the exception, and get a new
>> ResultScanner, and the pattern repeats. Jittery lockstep consisting of
>> being able to get a few successful next() calls, then a lock up.
>>
>>
>>
>> I have not yet tried upgrading from 90.1 to higher. Nor have I tried
>> tsuna's async client. Can anyone think of anything else I can try to
>> resolve this? I've sunk quite a few late nights into this, and would
> be
>> very excited to find a solution.
>>
>>
>>
>> -geoff
>>
>>
>

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