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From Stack <st...@duboce.net>
Subject Re: HRegionServer not shutting down
Date Tue, 13 Sep 2011 03:47:00 GMT
Are you trying to do replication?
St.Ack

On Mon, Sep 12, 2011 at 3:00 PM, Jeff Whiting <jeffw@qualtrics.com> wrote:
> I got some interesting stuff in the .out file.  I've included it below.  The
> stack traces have hbase classes in them but I'm unsure if it is related to
> hbase-4159.
>
> ~Jeff
>
> 2011-09-12 15:56:16
> Full thread dump Java HotSpot(TM) 64-Bit Server VM (17.0-b16 mixed mode):
>
> "Shutdownhook:regionserver60020" prio=10 tid=0x0000000044c5b800 nid=0x39e2
> in Object.wait() [0x000000004c9b4000]
>   java.lang.Thread.State: WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab1204150> (a java.lang.Thread)
>    at java.lang.Thread.join(Thread.java:1143)
>    - locked <0x00002aaab1204150> (a java.lang.Thread)
>    at org.apache.hadoop.hbase.util.Threads.shutdown(Threads.java:91)
>    at org.apache.hadoop.hbase.util.Threads.shutdown(Threads.java:79)
>    at
> org.apache.hadoop.hbase.regionserver.ShutdownHook$ShutdownHookThread.run(ShutdownHook.java:104)
>
> "SIGTERM handler" daemon prio=10 tid=0x00000000449f9800 nid=0x39e1 in
> Object.wait() [0x0000000042d4e000]
>   java.lang.Thread.State: WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab11dbb58> (a
> org.apache.hadoop.hbase.regionserver.ShutdownHook$ShutdownHookThread)
>    at java.lang.Thread.join(Thread.java:1143)
>    - locked <0x00002aaab11dbb58> (a
> org.apache.hadoop.hbase.regionserver.ShutdownHook$ShutdownHookThread)
>    at java.lang.Thread.join(Thread.java:1196)
>    at
> java.lang.ApplicationShutdownHooks.runHooks(ApplicationShutdownHooks.java:79)
>    at
> java.lang.ApplicationShutdownHooks$1.run(ApplicationShutdownHooks.java:24)
>    at java.lang.Shutdown.runHooks(Shutdown.java:79)
>    at java.lang.Shutdown.sequence(Shutdown.java:123)
>    at java.lang.Shutdown.exit(Shutdown.java:168)
>    - locked <0x00002aaae05e04e8> (a java.lang.Class for java.lang.Shutdown)
>    at java.lang.Terminator$1.handle(Terminator.java:35)
>    at sun.misc.Signal$1.run(Signal.java:195)
>    at java.lang.Thread.run(Thread.java:619)
>
> "LruBlockCache.EvictionThread" daemon prio=10 tid=0x00002aaaf036e800
> nid=0x6a6b in Object.wait() [0x000000004c5b0000]
>   java.lang.Thread.State: WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab273c0d0> (a
> org.apache.hadoop.hbase.io.hfile.LruBlockCache$EvictionThread)
>    at java.lang.Object.wait(Object.java:485)
>    at
> org.apache.hadoop.hbase.io.hfile.LruBlockCache$EvictionThread.run(LruBlockCache.java:519)
>    - locked <0x00002aaab273c0d0> (a
> org.apache.hadoop.hbase.io.hfile.LruBlockCache$EvictionThread)
>
> "regionserver60020.replicationSource,dev2" daemon prio=10
> tid=0x00002aaaf0312800 nid=0x69f8 in Object.wait() [0x000000004533e000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab12464c0> (a
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource)
>    at java.lang.Thread.join(Thread.java:1151)
>    - locked <0x00002aaab12464c0> (a
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource)
>    at org.apache.hadoop.hbase.util.Threads.shutdown(Threads.java:91)
>    at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.terminate(ReplicationSource.java:649)
>    at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource$1.uncaughtException(ReplicationSource.java:628)
>    at java.lang.Thread.dispatchUncaughtException(Thread.java:1831)
>
> "Timer thread for monitoring jvm" daemon prio=10 tid=0x00002aaaf4067000
> nid=0x69e8 in Object.wait() [0x0000000043152000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab26cb898> (a java.util.TaskQueue)
>    at java.util.TimerThread.mainLoop(Timer.java:509)
>    - locked <0x00002aaab26cb898> (a java.util.TaskQueue)
>    at java.util.TimerThread.run(Timer.java:462)
>
> "Timer thread for monitoring hbase" daemon prio=10 tid=0x00002aaaf4065800
> nid=0x69e7 in Object.wait() [0x0000000043051000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab217c3f0> (a java.util.TaskQueue)
>    at java.util.TimerThread.mainLoop(Timer.java:509)
>    - locked <0x00002aaab217c3f0> (a java.util.TaskQueue)
>    at java.util.TimerThread.run(Timer.java:462)
>
> "LeaseChecker" daemon prio=10 tid=0x00002aaaf4060800 nid=0x69e5 waiting on
> condition [0x0000000042e4f000]
>   java.lang.Thread.State: TIMED_WAITING (sleeping)
>    at java.lang.Thread.sleep(Native Method)
>    at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.run(DFSClient.java:1167)
>    at java.lang.Thread.run(Thread.java:619)
>
> "regionserver60020-EventThread" daemon prio=10 tid=0x00002aaaf4053800
> nid=0x69e3 waiting on condition [0x0000000042c4d000]
>   java.lang.Thread.State: WAITING (parking)
>    at sun.misc.Unsafe.park(Native Method)
>    - parking to wait for <0x00002aaab2719738> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
>    at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)
>    at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:399)
>    at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502)
>
> "regionserver60020-SendThread(ds1:2181)" daemon prio=10
> tid=0x00002aaaf4031000 nid=0x69e2 runnable [0x0000000042b4c000]
>   java.lang.Thread.State: RUNNABLE
>    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210)
>    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
>    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
>    - locked <0x00002aaab11fffe0> (a sun.nio.ch.Util$1)
>    - locked <0x00002aaab11fffc8> (a java.util.Collections$UnmodifiableSet)
>    - locked <0x00002aaab274f468> (a sun.nio.ch.EPollSelectorImpl)
>    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
>    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1107)
>
> "DestroyJavaVM" prio=10 tid=0x00002aaaf0189800 nid=0x69c1 waiting on
> condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
> "regionserver60020" prio=10 tid=0x00002aaaf01ca800 nid=0x69dc in
> Object.wait() [0x0000000040bb2000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab12464c0> (a
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource)
>    at java.lang.Thread.join(Thread.java:1151)
>    - locked <0x00002aaab12464c0> (a
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource)
>    at org.apache.hadoop.hbase.util.Threads.shutdown(Threads.java:91)
>    at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.terminate(ReplicationSource.java:649)
>    at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.terminate(ReplicationSource.java:636)
>    at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSourceManager.join(ReplicationSourceManager.java:225)
>    at
> org.apache.hadoop.hbase.replication.regionserver.Replication.join(Replication.java:97)
>    at
> org.apache.hadoop.hbase.regionserver.HRegionServer.join(HRegionServer.java:1419)
>    at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:683)
>    at java.lang.Thread.run(Thread.java:619)
>
> "Timer thread for monitoring rpc" daemon prio=10 tid=0x00002aaaf0181800
> nid=0x69db in Object.wait() [0x000000004294a000]
>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab0bb27e0> (a java.util.TaskQueue)
>    at java.util.TimerThread.mainLoop(Timer.java:509)
>    - locked <0x00002aaab0bb27e0> (a java.util.TaskQueue)
>    at java.util.TimerThread.run(Timer.java:462)
>
> "Low Memory Detector" daemon prio=10 tid=0x0000000043934000 nid=0x69cc
> runnable [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
> "CompilerThread1" daemon prio=10 tid=0x0000000043931800 nid=0x69cb waiting
> on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
> "CompilerThread0" daemon prio=10 tid=0x000000004392d000 nid=0x69ca waiting
> on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
> "Signal Dispatcher" daemon prio=10 tid=0x000000004392a800 nid=0x69c9 waiting
> on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
> "Surrogate Locker Thread (CMS)" daemon prio=10 tid=0x0000000043928800
> nid=0x69c8 waiting on condition [0x0000000000000000]
>   java.lang.Thread.State: RUNNABLE
>
> "Finalizer" daemon prio=10 tid=0x0000000043904000 nid=0x69c7 in
> Object.wait() [0x0000000041d3e000]
>   java.lang.Thread.State: WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab10dd220> (a java.lang.ref.ReferenceQueue$Lock)
>    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
>    - locked <0x00002aaab10dd220> (a java.lang.ref.ReferenceQueue$Lock)
>    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
>    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
>
> "Reference Handler" daemon prio=10 tid=0x0000000043902000 nid=0x69c6 in
> Object.wait() [0x0000000041c3d000]
>   java.lang.Thread.State: WAITING (on object monitor)
>    at java.lang.Object.wait(Native Method)
>    - waiting on <0x00002aaab0bbab60> (a java.lang.ref.Reference$Lock)
>    at java.lang.Object.wait(Object.java:485)
>    at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
>    - locked <0x00002aaab0bbab60> (a java.lang.ref.Reference$Lock)
>
> "VM Thread" prio=10 tid=0x00000000438fe000 nid=0x69c5 runnable
>
> "Gang worker#0 (Parallel GC Threads)" prio=10 tid=0x0000000043843800
> nid=0x69c2 runnable
>
> "Gang worker#1 (Parallel GC Threads)" prio=10 tid=0x0000000043845000
> nid=0x69c3 runnable
>
> "Concurrent Mark-Sweep GC Thread" prio=10 tid=0x00000000438a3800 nid=0x69c4
> runnable
> "VM Periodic Task Thread" prio=10 tid=0x000000004393f000 nid=0x69cd waiting
> on condition
>
> JNI global references: 1621
>
> Heap
>  par new generation   total 19136K, used 9478K [0x00002aaaae200000,
> 0x00002aaaaf6c0000, 0x00002aaab0b90000)
>  eden space 17024K,  54% used [0x00002aaaae200000, 0x00002aaaaeb115f0,
> 0x00002aaaaf2a0000)
>  from space 2112K,   9% used [0x00002aaaaf2a0000, 0x00002aaaaf2d0248,
> 0x00002aaaaf4b0000)
>  to   space 2112K,   0% used [0x00002aaaaf4b0000, 0x00002aaaaf4b0000,
> 0x00002aaaaf6c0000)
>  concurrent mark-sweep generation total 97196K, used 66304K
> [0x00002aaab0b90000, 0x00002aaab6a7b000, 0x00002aaae0200000)
>  concurrent-mark-sweep perm gen total 32624K, used 19532K
> [0x00002aaae0200000, 0x00002aaae21dc000, 0x00002aaae5600000)
>
>
>
>
> On 9/12/2011 10:59 AM, Stack wrote:
>>
>> Yes. I'd think the RS is done.  What happens if you do 'kill -QUIT
>> <PID>'.  Do you get output in the .out log?  I'd be interested in
>> checking it out Jeff.  I wonder if it:
>>
>>    HBASE-4159  HBaseServer - IPC Reader threads are not daemons (Douglas
>>                Campbell)
>>
>>
>> St.Ack
>>
>> On Mon, Sep 12, 2011 at 8:24 AM, Jeff Whiting<jeffw@qualtrics.com>  wrote:
>>>
>>> We are running cdh3u1 on centos 5.6 and we have frequent problems
>>> shutting
>>> down region servers.  They get stuck and the only thing I can do to stop
>>> them is a kill -9 which is a little harsh.  I tried doing a normal jstack
>>> but it doesn't respond.  With the -F option I get what you see at the
>>> bottom
>>> of the email.  Also in the region server logs I see the following which
>>> would imply that it should be shutdown.
>>>
>>> 2011-09-11 13:16:18,692 INFO
>>> org.apache.hadoop.hbase.regionserver.HRegionServer: Dump of metrics:
>>> requests=0, regions=16, stores=27, storefiles=17, storefileIndexSize=1,
>>> memstoreSize=10, compactionQueueSize=0, flushQueueSize=0, usedHeap=609,
>>> maxHeap=795, blockCacheSize=130088528, blockCacheFree=36818560,
>>> blockCacheCount=1055, blockCacheHitCount=2038243,
>>> blockCacheMissCount=92093,
>>> blockCacheEvictedCount=600, blockCacheHitRatio=95,
>>> blockCacheHitCachingRatio=99
>>> 2011-09-11 13:16:18,692 INFO
>>> org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: connection
>>> to
>>> cluster: dev2-0x331633b7ddb08ef-0x331633b7ddb08ef-0x331633b7ddb08ef
>>> connection to cluster:
>>> dev2-0x331633b7ddb08ef-0x331633b7ddb08ef-0x331633b7ddb08ef received
>>> expired
>>> from ZooKeeper, aborting
>>> 2011-09-11 13:16:18,692 INFO org.apache.zookeeper.ClientCnxn: EventThread
>>> shut down
>>> 2011-09-12 09:07:16,289 INFO
>>> org.apache.hadoop.hbase.regionserver.ShutdownHook: Shutdown hook
>>> starting;
>>> hbase.shutdown.hook=true; fsShutdownHook=Thread[Thread-15,5,main]
>>> 2011-09-12 09:07:16,289 INFO
>>> org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Shutdown
>>> hook
>>> Mon Sep 12 09:14:26 MDT 2011 Killing regionserver
>>>
>>> Any ideas as to why the region servers can't shutdown? My java version
>>> is:
>>>
>>> [root@ds1 hbase]# java -version
>>> java version "1.6.0_21"
>>> Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
>>> Java HotSpot(TM) 64-Bit Server VM (build 17.0-b16, mixed mode)
>>>
>>> Thanks,
>>>
>>> ~Jeff
>>>
>>> [root@ds1 ~]# jstack 18789
>>> 18789: Unable to open socket file: target process not responding or
>>> HotSpot
>>> VM not loaded
>>> The -F option can be used when the target process is not responding
>>> [root@ds1 ~]# jstack -F 18789
>>> Attaching to process ID 18789, please wait...
>>> Debugger attached successfully.
>>> Server compiler detected.
>>> JVM version is 17.0-b16
>>> Deadlock Detection:
>>>
>>> No deadlocks found.
>>>
>>> Thread 17578: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 17322: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 16419: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 16417: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 19017: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18901: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18871: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18870: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18815: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18868: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18843: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18840: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18823: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18822: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18821: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> Thread 18820: (state = BLOCKED)
>>> Error occurred during stack walking:
>>> sun.jvm.hotspot.debugger.DebuggerException:
>>> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
>>> lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet(LinuxDebuggerLocal.java:466)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxThread.getContext(LinuxThread.java:65)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess.getCurrentFrameGuess(LinuxAMD64JavaThreadPDAccess.java:92)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:256)
>>>    at
>>>
>>> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:218)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>>>    at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>>>    at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>>>    at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>>>    at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>>>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>    at
>>>
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>    at
>>>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>    at java.lang.reflect.Method.invoke(Method.java:597)
>>>    at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
>>>    at sun.tools.jstack.JStack.main(JStack.java:84)
>>> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
>>> failed for a lwp
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native
>>> Method)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$800(LinuxDebuggerLocal.java:51)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:460)
>>>    at
>>>
>>> sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)
>>>
>>>
>>> --
>>> Jeff Whiting
>>> Qualtrics Senior Software Engineer
>>> jeffw@qualtrics.com
>>>
>>>
>
> --
> Jeff Whiting
> Qualtrics Senior Software Engineer
> jeffw@qualtrics.com
>
>

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