GitHub user dudaerich opened a pull request:
https://github.com/apache/activemq-artemis/pull/1622
ARTEMIS-1485 ActiveMQTestBase.threadDump should print information about
locks and deadlocks
Improved implementation of ActiveMQTestBase.threadDump which uses
ThreadMXBean
for getting information about threads including locks and deadlocks.
Sample of the thread dump
```
Complete Thread dump - fired by
MultiThreadRandomReattachTestBase::runTestMultipleThreads (AMQ119014: Timed out
after waiting 30,000 ms for response when sending packet 105)
"Thread-4 (ActiveMQ-scheduled-threads)" Id=183 WAITING on
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@2dc00c99
at sun.misc.Unsafe.park(Native Method)
- waiting on
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@2dc00c99
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
at
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
"Thread-34
(ActiveMQ-remoting-threads-ActiveMQServerImpl::serverUUID=1a0105d4-bd4f-11e7-973f-fa163e2a7ec6-440938038)"
Id=160 WAITING on java.util.concurrent.CountDownLatch$Sync@41e2c73f
at sun.misc.Unsafe.park(Native Method)
- waiting on java.util.concurrent.CountDownLatch$Sync@41e2c73f
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
at
org.apache.activemq.artemis.utils.SimpleFutureImpl.get(SimpleFutureImpl.java:62)
at
org.apache.activemq.artemis.core.protocol.core.ServerSessionPacketHandler.transferConnection(ServerSessionPacketHandler.java:911)
at
org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQPacketHandler.handleReattachSession(ActiveMQPacketHandler.java:242)
at
org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQPacketHandler.handlePacket(ActiveMQPacketHandler.java:103)
at
org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.handlePacket(ChannelImpl.java:638)
at
org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.doBufferReceived(RemotingConnectionImpl.java:392)
- locked java.lang.Object@1409cb91
at
org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.bufferReceived(RemotingConnectionImpl.java:374)
at
org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl$DelegatingBufferHandler.bufferReceived(RemotingServiceImpl.java:642)
at
org.apache.activemq.artemis.core.remoting.impl.invm.InVMConnection$1.run(InVMConnection.java:196)
at
org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:42)
at
org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:31)
at
org.apache.activemq.artemis.utils.actors.ProcessorBase$ExecutorTask.run(ProcessorBase.java:53)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Number of locked synchronizers = 1
- java.util.concurrent.ThreadPoolExecutor$Worker@1f764375
===============================================================================
End Thread dump - fired by
MultiThreadRandomReattachTestBase::runTestMultipleThreads (AMQ119014: Timed out
after waiting 30,000 ms for response when sending packet 105)
*******************************************************************************
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dudaerich/activemq-artemis ARTEMIS-1485
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/activemq-artemis/pull/1622.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1622
----
commit 726158d77fe2bdf4890586ee4435f93f5ad42852
Author: Erich Duda <[email protected]>
Date: 2017-10-30T08:41:23Z
ARTEMIS-1485 ActiveMQTestBase.threadDump should print information about
locks and deadlocks
Improved implementation of ActiveMQTestBase.threadDump which uses
ThreadMXBean
for getting information about threads including locks and deadlocks.
----
---
