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https://issues.apache.org/activemq/browse/AMQ-2435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=54571#action_54571
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Hiram Chirino commented on AMQ-2435:
------------------------------------
Fix applied to trunk and 5.3 branch.
> NullPointer Exception Occurs when using producer flow control
> -------------------------------------------------------------
>
> Key: AMQ-2435
> URL: https://issues.apache.org/activemq/browse/AMQ-2435
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Reporter: Hiram Chirino
> Assignee: Hiram Chirino
> Priority: Blocker
> Fix For: 5.3.0
>
>
> Looks like there is a synchronization issue still with producer based flow
> control. Here is the stack trace of the problem:
> {code}
> Caused by: java.lang.NullPointerException
> at org.apache.activemq.broker.region.Queue.doMessageSend(Queue.java:533)
> at org.apache.activemq.broker.region.Queue$7.run(Queue.java:442)
> at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1102)
> 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:651)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)
> at java.lang.Thread.run(Thread.java:613)
> {code}
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