Deadlock on ServerSessionImpl that hangs all connection consumers
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Key: AMQ-1267
URL: https://issues.apache.org/activemq/browse/AMQ-1267
Project: ActiveMQ
Issue Type: Bug
Affects Versions: 4.0.2
Environment: Java 1.5.0_11
Reporter: Jonas Collaros
We are encountering regularly the deadlock mentioned below hours into program
execution. It has been correlated with the exhaustion of the JVM heap, though
it is unclear if running out of memory is a cause or consequence of this
deadlock. At the least, system memory usage seems stable otherwise. We well be
taking further thread dumps of the system to try to pinpoint which occurs first.
Is this a known issue in AMQ 4.0.2, or do you have any other insights?
Found one Java-level deadlock:
=============================
"Thread-20":
waiting to lock monitor 0x5f80a2bc (object 0x73145af0, a java.lang.Object),
which is held by "Thread-18"
"Thread-18":
waiting to lock monitor 0x5f80a27c (object 0x73124630, a
org.apache.activemq.ra.ServerSessionPoolImpl),
which is held by "Thread-20"
Java stack information for the threads listed above:
===================================================
"Thread-20":
at
org.apache.activemq.ra.ServerSessionImpl.start(ServerSessionImpl.java:118)
- waiting to lock <0x73145af0> (a java.lang.Object)
at
org.apache.activemq.ra.ServerSessionPoolImpl.dispatchToSession(ServerSessionPoolImpl.java:149)
at
org.apache.activemq.ra.ServerSessionPoolImpl.removeFromPool(ServerSessionPoolImpl.java:176)
- locked <0x73124630> (a org.apache.activemq.ra.ServerSessionPoolImpl)
at
org.apache.activemq.ra.ServerSessionImpl.run(ServerSessionImpl.java:178)
- locked <0x731460e8> (a java.lang.Object)
- locked <0x73145fe0> (a org.apache.activemq.ra.ServerSessionImpl)
at
org.apache.geronimo.connector.work.WorkerContext.run(WorkerContext.java:291)
at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:732)
at java.lang.Thread.run(Thread.java:595)
"Thread-18":
at
org.apache.activemq.ra.ServerSessionPoolImpl.removeFromPool(ServerSessionPoolImpl.java:171)
- waiting to lock <0x73124630> (a
org.apache.activemq.ra.ServerSessionPoolImpl)
at
org.apache.activemq.ra.ServerSessionImpl.run(ServerSessionImpl.java:178)
- locked <0x73145af0> (a java.lang.Object)
- locked <0x731459e8> (a org.apache.activemq.ra.ServerSessionImpl)
at
org.apache.geronimo.connector.work.WorkerContext.run(WorkerContext.java:291)
at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:732)
at java.lang.Thread.run(Thread.java:595)
Found 1 deadlock.
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