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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1805) [hbase] Region server hang on exit
Date Wed, 29 Aug 2007 03:25:30 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jim Kellerman updated HADOOP-1805:
----------------------------------

    Attachment: console.txt

Console log for the test that failed.

> [hbase] Region server hang on exit
> ----------------------------------
>
>                 Key: HADOOP-1805
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1805
>             Project: Hadoop
>          Issue Type: Bug
>          Components: contrib/hbase
>    Affects Versions: 0.15.0
>            Reporter: Jim Kellerman
>            Assignee: Jim Kellerman
>             Fix For: 0.15.0
>
>         Attachments: console.txt
>
>
> Observed a region server hung in exit in Hudson-Patch build #637 and managed to get a
thread dump. Subsequent comments will include analysis of same.
>     [junit] Full thread dump Java HotSpot(TM) Server VM (1.5.0_11-b03 mixed mode):
>     [junit] "IPC Client connection to localhost/127.0.0.1:40856" daemon prio=10 tid=0x08cdd8f0
nid=0xaca in Object.wait() [0xe2853000..0xe2853bb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xf7629730> (a org.apache.hadoop.ipc.Client$Connection)
>     [junit] 	at java.lang.Object.wait(Object.java:474)
>     [junit] 	at org.apache.hadoop.ipc.Client$Connection.waitForWork(Client.java:214)
>     [junit] 	- locked <0xf7629730> (a org.apache.hadoop.ipc.Client$Connection)
>     [junit] 	at org.apache.hadoop.ipc.Client$Connection.run(Client.java:253)
>     [junit] "RegionServer:0.cacheFlusher" prio=10 tid=0x08319ac0 nid=0x7d in Object.wait()
[0xe2643000..0xe2643ab8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe8229a78> (a java.lang.Integer)
>     [junit] 	at java.lang.Object.wait(Object.java:474)
>     [junit] 	at org.apache.hadoop.hbase.HLocking.obtainWriteLock(HLocking.java:87)
>     [junit] 	- locked <0xe8229a78> (a java.lang.Integer)
>     [junit] 	at org.apache.hadoop.hbase.HMemcache.deleteSnapshot(HMemcache.java:119)
>     [junit] 	at org.apache.hadoop.hbase.HRegion.internalFlushcache(HRegion.java:860)
>     [junit] 	at org.apache.hadoop.hbase.HRegion.flushcache(HRegion.java:778)
>     [junit] 	at org.apache.hadoop.hbase.HRegion.optionallyFlush(HRegion.java:721)
>     [junit] 	at org.apache.hadoop.hbase.HRegionServer$Flusher.run(HRegionServer.java:306)
>     [junit] 	- locked <0xe8220778> (a java.lang.Integer)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "RegionServer:0" prio=10 tid=0x0896d918 nid=0x7a waiting for monitor entry
[0xe278d000..0xe278dbb8]
>     [junit] 	at org.apache.hadoop.hbase.HRegionServer.run(HRegionServer.java:723)
>     [junit] 	- waiting to lock <0xe8220778> (a java.lang.Integer)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] 	at org.apache.hadoop.hbase.MiniHBaseCluster$RegionServerThread.run(MiniHBaseCluster.java:179)
>     [junit] "org.apache.hadoop.dfs.DataNode$DataXceiveServer@19ec4ed" daemon prio=10
tid=0x08cb6508 nid=0x3f runnable [0xe2b09000..0xe2b09d38]
>     [junit] 	at java.net.PlainSocketImpl.socketAccept(Native Method)
>     [junit] 	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
>     [junit] 	- locked <0xe81157e8> (a java.net.SocksSocketImpl)
>     [junit] 	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
>     [junit] 	at java.net.ServerSocket.accept(ServerSocket.java:421)
>     [junit] 	at org.apache.hadoop.dfs.DataNode$DataXceiveServer.run(DataNode.java:678)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "DataNode: [/export/home/hudson/hudson/jobs/Hadoop-Patch/workspace/trunk/build/contrib/hbase/test/data/dfs/data/data3,/export/home/hudson/hudson/jobs/Hadoop-Patch/workspace/trunk/build/contrib/hbase/test/data/dfs/data/data4]"
daemon prio=10 tid=0x08ae8110 nid=0x3e in Object.wait() [0xe2b4b000..0xe2b4bdb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe81ac050> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.dfs.DataNode.offerService(DataNode.java:545)
>     [junit] 	- locked <0xe81ac050> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.dfs.DataNode.run(DataNode.java:1310)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "SocketListener2-1" prio=10 tid=0x08c694d8 nid=0x3d in Object.wait() [0xe2b8d000..0xe2b8db38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe80fbbc0> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] 	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:522)
>     [junit] 	- locked <0xe80fbbc0> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] "SocketListener2-0" prio=10 tid=0x08bf7980 nid=0x3c in Object.wait() [0xe2bcf000..0xe2bcfa38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe80fbb48> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] 	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:522)
>     [junit] 	- locked <0xe80fbb48> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] "Acceptor ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=40937]" prio=10
tid=0x08903ca0 nid=0x3b runnable [0xe2c11000..0xe2c11bb8]
>     [junit] 	at java.net.PlainSocketImpl.socketAccept(Native Method)
>     [junit] 	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
>     [junit] 	- locked <0xe80f9ad8> (a java.net.SocksSocketImpl)
>     [junit] 	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
>     [junit] 	at java.net.ServerSocket.accept(ServerSocket.java:421)
>     [junit] 	at org.mortbay.util.ThreadedServer.acceptSocket(ThreadedServer.java:432)
>     [junit] 	at org.mortbay.util.ThreadedServer$Acceptor.run(ThreadedServer.java:631)
>     [junit] "SessionScavenger" daemon prio=10 tid=0x08903b18 nid=0x3a waiting on condition
[0xe2c53000..0xe2c53ab8]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger.run(AbstractSessionManager.java:587)
>     [junit] "org.apache.hadoop.dfs.DataNode$DataXceiveServer@162e295" daemon prio=10
tid=0x08cdc3d8 nid=0x31 runnable [0xe2c95000..0xe2c95c38]
>     [junit] 	at java.net.PlainSocketImpl.socketAccept(Native Method)
>     [junit] 	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
>     [junit] 	- locked <0xe8112930> (a java.net.SocksSocketImpl)
>     [junit] 	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
>     [junit] 	at java.net.ServerSocket.accept(ServerSocket.java:421)
>     [junit] 	at org.apache.hadoop.dfs.DataNode$DataXceiveServer.run(DataNode.java:678)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "DataNode: [/export/home/hudson/hudson/jobs/Hadoop-Patch/workspace/trunk/build/contrib/hbase/test/data/dfs/data/data1,/export/home/hudson/hudson/jobs/Hadoop-Patch/workspace/trunk/build/contrib/hbase/test/data/dfs/data/data2]"
daemon prio=10 tid=0x08cde340 nid=0x30 in Object.wait() [0xe2cd7000..0xe2cd7cb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe81ac150> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.dfs.DataNode.offerService(DataNode.java:545)
>     [junit] 	- locked <0xe81ac150> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.dfs.DataNode.run(DataNode.java:1310)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "SocketListener1-1" prio=10 tid=0x08892b40 nid=0x2e in Object.wait() [0xe2d5b000..0xe2d5bdb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe813edd8> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] 	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:522)
>     [junit] 	- locked <0xe813edd8> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] "SocketListener1-0" prio=10 tid=0x0872e0d0 nid=0x2d in Object.wait() [0xe2d9d000..0xe2d9da38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe813ed60> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] 	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:522)
>     [junit] 	- locked <0xe813ed60> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] "Acceptor ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=40919]" prio=10
tid=0x0872de98 nid=0x2c runnable [0xe2e63000..0xe2e63ab8]
>     [junit] 	at java.net.PlainSocketImpl.socketAccept(Native Method)
>     [junit] 	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
>     [junit] 	- locked <0xe8115270> (a java.net.SocksSocketImpl)
>     [junit] 	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
>     [junit] 	at java.net.ServerSocket.accept(ServerSocket.java:421)
>     [junit] 	at org.mortbay.util.ThreadedServer.acceptSocket(ThreadedServer.java:432)
>     [junit] 	at org.mortbay.util.ThreadedServer$Acceptor.run(ThreadedServer.java:631)
>     [junit] "SessionScavenger" daemon prio=10 tid=0x08b43180 nid=0x2b waiting on condition
[0xe2ddf000..0xe2ddfb38]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger.run(AbstractSessionManager.java:587)
>     [junit] "org.apache.hadoop.dfs.DFSClient$LeaseChecker@269997" daemon prio=10 tid=0x088c3d48
nid=0x25 waiting on condition [0xe2e21000..0xe2e21a38]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.dfs.DFSClient$LeaseChecker.run(DFSClient.java:551)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "org.apache.hadoop.io.ObjectWritable Connection Culler" daemon prio=10 tid=0x088bf440
nid=0x23 waiting on condition [0xe2ea5000..0xe2ea5cb8]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.ipc.Client$ConnectionCuller.run(Client.java:402)
>     [junit] "IPC Server handler 9 on 40856" daemon prio=10 tid=0x08b48878 nid=0x22 in
Object.wait() [0xe2ee7000..0xe2ee7b38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 8 on 40856" daemon prio=10 tid=0x08b47ca0 nid=0x21 in
Object.wait() [0xe2f29000..0xe2f29c38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 7 on 40856" daemon prio=10 tid=0x08b470c8 nid=0x20 in
Object.wait() [0xe2f6b000..0xe2f6bc38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 6 on 40856" daemon prio=10 tid=0x08b464f0 nid=0x1f in
Object.wait() [0xe2fad000..0xe2fadbb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 5 on 40856" daemon prio=10 tid=0x08b45918 nid=0x1e in
Object.wait() [0xe2fef000..0xe2fefdb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 4 on 40856" daemon prio=10 tid=0x08973410 nid=0x1d in
Object.wait() [0xe3031000..0xe3031d38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 3 on 40856" daemon prio=10 tid=0x08972c38 nid=0x1c in
Object.wait() [0xe3073000..0xe3073cb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 2 on 40856" daemon prio=10 tid=0x08b4afb8 nid=0x1b in
Object.wait() [0xe30b5000..0xe30b5ab8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 1 on 40856" daemon prio=10 tid=0x08cdf5f8 nid=0x1a in
Object.wait() [0xe30f7000..0xe30f7a38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server handler 0 on 40856" daemon prio=10 tid=0x08b4a460 nid=0x19 in
Object.wait() [0xe3139000..0xe3139bb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7e310a0> (a java.util.LinkedList)
>     [junit] 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:540)
>     [junit] 	- locked <0xe7e310a0> (a java.util.LinkedList)
>     [junit] "IPC Server listener on 40856" daemon prio=10 tid=0x08b3a3c8 nid=0x18 runnable
[0xe317b000..0xe317bd38]
>     [junit] 	at sun.nio.ch.DevPollArrayWrapper.poll0(Native Method)
>     [junit] 	at sun.nio.ch.DevPollArrayWrapper.poll(DevPollArrayWrapper.java:164)
>     [junit] 	at sun.nio.ch.DevPollSelectorImpl.doSelect(DevPollSelectorImpl.java:68)
>     [junit] 	at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
>     [junit] 	- locked <0xe7e313b8> (a sun.nio.ch.Util$1)
>     [junit] 	- locked <0xe7e313a8> (a java.util.Collections$UnmodifiableSet)
>     [junit] 	- locked <0xe7e31250> (a sun.nio.ch.DevPollSelectorImpl)
>     [junit] 	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
>     [junit] 	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:84)
>     [junit] 	at org.apache.hadoop.ipc.Server$Listener.run(Server.java:255)
>     [junit] "SocketListener0-1" prio=10 tid=0x08b3b070 nid=0x17 in Object.wait() [0xe31bd000..0xe31bddb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe81acdf0> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] 	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:522)
>     [junit] 	- locked <0xe81acdf0> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] "SocketListener0-0" prio=10 tid=0x08ce2818 nid=0x16 in Object.wait() [0xe31ff000..0xe31ffb38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe81ace68> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] 	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:522)
>     [junit] 	- locked <0xe81ace68> (a org.mortbay.util.ThreadPool$PoolThread)
>     [junit] "Acceptor ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=40866]" prio=10
tid=0x08cde518 nid=0x15 runnable [0xe3241000..0xe3241a38]
>     [junit] 	at java.net.PlainSocketImpl.socketAccept(Native Method)
>     [junit] 	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
>     [junit] 	- locked <0xe80ce590> (a java.net.SocksSocketImpl)
>     [junit] 	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
>     [junit] 	at java.net.ServerSocket.accept(ServerSocket.java:421)
>     [junit] 	at org.mortbay.util.ThreadedServer.acceptSocket(ThreadedServer.java:432)
>     [junit] 	at org.mortbay.util.ThreadedServer$Acceptor.run(ThreadedServer.java:631)
>     [junit] "SessionScavenger" daemon prio=10 tid=0x08b3aa80 nid=0x14 waiting on condition
[0xe3283000..0xe3283ab8]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger.run(AbstractSessionManager.java:587)
>     [junit] "org.apache.hadoop.dfs.FSNamesystem$DecommissionedMonitor@1fa1bb6" daemon
prio=10 tid=0x088a7a48 nid=0x13 waiting on condition [0xe32c5000..0xe32c5b38]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.dfs.FSNamesystem$DecommissionedMonitor.run(FSNamesystem.java:3010)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "org.apache.hadoop.dfs.FSNamesystem$ReplicationMonitor@ecb281" daemon prio=10
tid=0x0878eb88 nid=0x12 waiting on condition [0xe3307000..0xe3307bb8]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.dfs.FSNamesystem$ReplicationMonitor.run(FSNamesystem.java:1803)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "org.apache.hadoop.dfs.FSNamesystem$LeaseMonitor@14384c2" daemon prio=10
tid=0x083b93f0 nid=0x11 waiting on condition [0xe3349000..0xe3349c38]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.dfs.FSNamesystem$LeaseMonitor.run(FSNamesystem.java:1448)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "org.apache.hadoop.dfs.FSNamesystem$HeartbeatMonitor@497934" daemon prio=10
tid=0x089bf650 nid=0x10 waiting on condition [0xe338b000..0xe338bcb8]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.dfs.FSNamesystem$HeartbeatMonitor.run(FSNamesystem.java:1787)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "org.apache.hadoop.dfs.PendingReplicationBlocks$PendingReplicationMonitor@1c5f743"
daemon prio=10 tid=0x0878ca90 nid=0xf waiting on condition [0xe33cd000..0xe33cdd38]
>     [junit] 	at java.lang.Thread.sleep(Native Method)
>     [junit] 	at org.apache.hadoop.dfs.PendingReplicationBlocks$PendingReplicationMonitor.run(PendingReplicationBlocks.java:182)
>     [junit] 	at java.lang.Thread.run(Thread.java:595)
>     [junit] "Low Memory Detector" daemon prio=10 tid=0x081a53b0 nid=0xd runnable [0x00000000..0x00000000]
>     [junit] "CompilerThread1" daemon prio=10 tid=0x081a3b38 nid=0xc waiting on condition
[0x00000000..0xf8086e48]
>     [junit] "CompilerThread0" daemon prio=10 tid=0x081a2d08 nid=0xb waiting on condition
[0x00000000..0xf80c8ec0]
>     [junit] "AdapterThread" daemon prio=10 tid=0x081a1ed8 nid=0xa waiting on condition
[0x00000000..0x00000000]
>     [junit] "Signal Dispatcher" daemon prio=10 tid=0x081a1148 nid=0x9 waiting on condition
[0x00000000..0x00000000]
>     [junit] "Finalizer" daemon prio=10 tid=0x081950d8 nid=0x8 in Object.wait() [0xf81bb000..0xf81bbcb8]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7f06c50> (a java.lang.ref.ReferenceQueue$Lock)
>     [junit] 	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
>     [junit] 	- locked <0xe7f06c50> (a java.lang.ref.ReferenceQueue$Lock)
>     [junit] 	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
>     [junit] 	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
>     [junit] "Reference Handler" daemon prio=10 tid=0x08194be8 nid=0x7 in Object.wait()
[0xf81fd000..0xf81fdd38]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe7f13540> (a java.lang.ref.Reference$Lock)
>     [junit] 	at java.lang.Object.wait(Object.java:474)
>     [junit] 	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
>     [junit] 	- locked <0xe7f13540> (a java.lang.ref.Reference$Lock)
>     [junit] "main" prio=10 tid=0x080769b8 nid=0x1 in Object.wait() [0x08045000..0x080460f0]
>     [junit] 	at java.lang.Object.wait(Native Method)
>     [junit] 	- waiting on <0xe82203b0> (a org.apache.hadoop.hbase.MiniHBaseCluster$RegionServerThread)
>     [junit] 	at java.lang.Thread.join(Thread.java:1095)
>     [junit] 	- locked <0xe82203b0> (a org.apache.hadoop.hbase.MiniHBaseCluster$RegionServerThread)
>     [junit] 	at java.lang.Thread.join(Thread.java:1148)
>     [junit] 	at org.apache.hadoop.hbase.MiniHBaseCluster.shutdown(MiniHBaseCluster.java:343)
>     [junit] 	- locked <0xe821da80> (a java.util.ArrayList)
>     [junit] 	at org.apache.hadoop.hbase.MiniHBaseCluster.shutdown(MiniHBaseCluster.java:365)
>     [junit] 	at org.apache.hadoop.hbase.HBaseClusterTestCase.tearDown(HBaseClusterTestCase.java:69)
>     [junit] 	at junit.framework.TestCase.runBare(TestCase.java:130)
>     [junit] 	at junit.framework.TestResult$1.protect(TestResult.java:106)
>     [junit] 	at junit.framework.TestResult.runProtected(TestResult.java:124)
>     [junit] 	at junit.framework.TestResult.run(TestResult.java:109)
>     [junit] 	at junit.framework.TestCase.run(TestCase.java:118)
>     [junit] 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
>     [junit] 	at junit.framework.TestSuite.run(TestSuite.java:203)
>     [junit] 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
>     [junit] 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
>     [junit] 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
>     [junit] "VM Thread" prio=10 tid=0x08192b10 nid=0x6 runnable 
>     [junit] "GC task thread#0 (ParallelGC)" prio=10 tid=0x080f8328 nid=0x2 runnable 
>     [junit] "GC task thread#1 (ParallelGC)" prio=10 tid=0x080f8d68 nid=0x3 runnable 
>     [junit] "GC task thread#2 (ParallelGC)" prio=10 tid=0x080f97a8 nid=0x4 runnable 
>     [junit] "GC task thread#3 (ParallelGC)" prio=10 tid=0x080fa1e8 nid=0x5 runnable 
>     [junit] "VM Periodic Task Thread" prio=10 tid=0x081a65f8 nid=0xe waiting on condition


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