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https://issues.apache.org/jira/browse/QPIDJMS-458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16873680#comment-16873680
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Christian Danner commented on QPIDJMS-458:
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Thank you very much for investigating this issue so quickly. Concerning your
questions above: we just rolled out the modification this week so I cannot say
yet if it makes things better or worse but I already had the fear that it may
have unintended side effects.
However I assume during normal operation our generous timeout of 60sec doesn't
cause any major problems and so far everything works fine so we have to wait
and see what happens when we encounter this situation again.
We are currently not using multiple consumers per session, however for the
receiving part we create a separate Thread for each queue and we implemented a
small session manager component that ensures that each Thread uses a distinct
session for which a single consumer is created that reads the messages from the
corresponding queue.
> Potential race condition in JmsConnection.destroyResource
> ---------------------------------------------------------
>
> Key: QPIDJMS-458
> URL: https://issues.apache.org/jira/browse/QPIDJMS-458
> Project: Qpid JMS
> Issue Type: Bug
> Components: qpid-jms-client
> Affects Versions: 0.42.0
> Environment: OS: Windows 10 64Bit
> Broker: Apache Artemis 2.8.0
> JVM: Java HotSpot(TM) Client VM (25.40-b25, mixed mode)
> Java: version 1.8.0_40, vendor Oracle Corporation
> Reporter: Christian Danner
> Priority: Major
> Attachments: qpid_client_issue.txt
>
>
> It seems there is a race condition when attempting to close a
> JmsMessageProducer as indicated by the stack trace below. The corresponding
> Thread is stuck waiting for the JmsMessageProducer to be destroyed for a
> JmsConnection.
> This behaviour was observed while testing Apache Artemis with low disk space.
> In the provided trace we attempt to close a broker connection due to a
> JMSException (TransactionRolledBackException caused by a duplicate message
> ID), however the Thread gets stuck indefinitely waiting for the
> JmsMessageProducer to be destroyed.
> We keep track of all sessions for a JmsConnection (one session per Thread)
> and attempt to perform a graceful connection shutdown by closing all
> producers and consumers, followed by each session before finally calling
> close on the connection.
> We use external synchronization to ensure that the connection can only be
> closed by a single Thread (so in this example all other Threads attempting to
> use the broker connection are blocked waiting for the lock from the closing
> Thread to be released).
>
> Stack Trace:
> {{"Replicator_node1-->node2_[0ms]" #25 prio=5 os_prio=0 tid=0x49383c00
> nid=0x3918 in Object.wait() [0x4b1ef000]
> java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at
> org.apache.qpid.jms.provider.BalancedProviderFuture.sync(BalancedProviderFuture.java:137)
> - locked <0x04e60300> (a
> org.apache.qpid.jms.provider.BalancedProviderFuture)
> at
> org.apache.qpid.jms.JmsConnection.destroyResource(JmsConnection.java:755)
> at
> org.apache.qpid.jms.JmsConnection.destroyResource(JmsConnection.java:744)
> at
> org.apache.qpid.jms.JmsMessageProducer.doClose(JmsMessageProducer.java:103)
> at
> org.apache.qpid.jms.JmsMessageProducer.close(JmsMessageProducer.java:89)
> at
> acme.broker.client.jms.impl.JMSMessageProducer.closeInternal(JMSMessageProducer.java:48)
> at
> acme.broker.client.jms.impl.JMSMessageProducer.close(JMSMessageProducer.java:43)
> at acme.broker.client.AbstractSession.tryClose(AbstractSession.java:108)
> at acme.broker.client.AbstractSession.close(AbstractSession.java:90)
> at
> acme.broker.client.AbstractThreadedSessionManager.close(AbstractThreadedSessionManager.java:108)
> - locked <0x1d321078> (a java.util.concurrent.ConcurrentHashMap)
> at
> acme.broker.client.AbstractBrokerConnection.closeInternal(AbstractBrokerConnection.java:204)
> at
> acme.broker.client.AbstractBrokerConnection.close(AbstractBrokerConnection.java:84)
> at
> acme.replication.jms.JMSMessageBridge.trySend(JMSMessageBridge.java:109)
> at
> acme.replication.jms.JMSMessageBridge.access$6(JMSMessageBridge.java:99)
> at
> acme.replication.jms.JMSMessageBridge$ReplicatorRunnable.run(JMSMessageBridge.java:62)
> at java.lang.Thread.run(Thread.java:745)
> Locked ownable synchronizers:
> - <0x1cfa76b0> (a
> java.util.concurrent.locks.ReentrantLock$NonfairSync)}}
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