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https://issues.apache.org/activemq/browse/AMQ-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46374#action_46374
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Jayson Minard commented on AMQ-1971:
------------------------------------
This is on 5.2.0 built from SVN tag of the same name. Client
producer/consumers use POM 5.2.0 from staging server.
Bug also exists when running on 1 broker without a network of brokers.
The series of queues basically are via Camel:
File -> parsing -> queue
queue -> normalization -> queue
queue -> database transactions -> queue
queue -> external systems
> ConcurrentModificationException in high volume broker
> ------------------------------------------------------
>
> Key: AMQ-1971
> URL: https://issues.apache.org/activemq/browse/AMQ-1971
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.2.0
> Reporter: Jayson Minard
>
> This is occurring in the thousands as messages come through. We have a
> network of 5 brokers although they do most of their work internally
> (publisher/consumer for queue are only on same broker) and do less work
> crossing to a central broker.
> java.util.ConcurrentModificationException
> at
> java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
> at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:392)
> at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:391)
> at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.next(AbstractStoreCursor.java:136)
> at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.next(StoreQueueCursor.java:140)
> at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1178)
> at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1290)
> at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1004)
> at
> org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)
> at
> org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
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