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https://issues.apache.org/jira/browse/AMQ-3700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Timothy Bish resolved AMQ-3700.
-------------------------------
Resolution: Fixed
Fix applied in trunk
> java.util.ConcurrentModificationException in
> org.apache.activemq.broker.region.Queue.iterate()
> ----------------------------------------------------------------------------------------------
>
> Key: AMQ-3700
> URL: https://issues.apache.org/jira/browse/AMQ-3700
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.5.1
> Reporter: Timothy Bish
> Assignee: Timothy Bish
> Priority: Minor
> Fix For: 5.6.0
>
>
> The following stack was reproduced in AMQ 5.5.1 but not the Fuse Message
> Broker version.
> {noformat}
> Exception in thread
> "BrokerService[3561F026-E8F62746-2A202922-F17EADF0-7BCA8E67] Task-5053"
> java.util.ConcurrentModificationException
> jvm 1 | at
> java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
> jvm 1 | at
> java.util.LinkedHashMap$ValueIterator.next(LinkedHashMap.java:388)
> jvm 1 | at
> org.apache.activemq.broker.region.Queue.iterate(Queue.java:1376)
> jvm 1 | at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
> jvm 1 | at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
> jvm 1 | at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> jvm 1 | at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> jvm 1 | at java.lang.Thread.run(Thread.java:662)
> {noformat}
> This can happened only in the case where the optimizedDispatch mode is
> enabled and multiple producers are waiting for space. When the memory usage
> decreases and the notifications are run from the iterate() method the method
> can be called recursively leading to the error as items are removed from the
> messagesWaitingForSpace map.
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