Geoff Denning created AMQ-8416:
----------------------------------
Summary: Deadlock during failover transport reconnect
Key: AMQ-8416
URL: https://issues.apache.org/jira/browse/AMQ-8416
Project: ActiveMQ
Issue Type: Bug
Components: Transport
Affects Versions: 5.16.0
Environment: Amazon Linux 2, Apache Tomcat, Java 8
Reporter: Geoff Denning
Using the ActiveMQ Failover Transport, we're seeing issues where our
application stops receiving messages from ActiveMQ. We ran a thread dump, and
saw that a Java-level deadlock was detected between two ActiveMQ threads:
{code:java}
Found one Java-level deadlock:
=============================
"ActiveMQ Task-1":
waiting to lock monitor 0x00007f8286d91a18 (object 0x00000000c06966d8, a
java.lang.Object),
which is held by "ActiveMQ Task-3"
"ActiveMQ Task-3":
waiting to lock monitor 0x00007f8286d91ac8 (object 0x00000000c0afb960, a
java.lang.Object),
which is held by "ActiveMQ Task-1"Java stack information for the threads
listed above:
===================================================
"ActiveMQ Task-1":
at
org.apache.activemq.transport.failover.FailoverTransport.handleTransportFailure(FailoverTransport.java:274)
- waiting to lock <0x00000000c06966d8> (a java.lang.Object)
at
org.apache.activemq.transport.failover.FailoverTransport$3.onException(FailoverTransport.java:224)
at
org.apache.activemq.transport.failover.FailoverTransport.propagateFailureToExceptionListener(FailoverTransport.java:1147)
at
org.apache.activemq.transport.failover.FailoverTransport.doReconnect(FailoverTransport.java:1096)
- locked <0x00000000c0afb960> (a java.lang.Object)
at
org.apache.activemq.transport.failover.FailoverTransport$2.iterate(FailoverTransport.java:149)
- locked <0x00000000c0afb998> (a java.lang.Object)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:133)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
"ActiveMQ Task-3":
at java.lang.Object.wait(Native Method)
at
org.apache.activemq.transport.failover.FailoverTransport.oneway(FailoverTransport.java:623)
- locked <0x00000000c0afb960> (a java.lang.Object)
at
org.apache.activemq.transport.failover.FailoverTransport.restoreTransport(FailoverTransport.java:853)
at
org.apache.activemq.transport.failover.FailoverTransport.doReconnect(FailoverTransport.java:1022)
- locked <0x00000000c06966d8> (a java.lang.Object)
at
org.apache.activemq.transport.failover.FailoverTransport$2.iterate(FailoverTransport.java:149)
- locked <0x00000000c06966e8> (a java.lang.Object)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:133)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Found 1 deadlock. {code}
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