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https://issues.apache.org/jira/browse/JAMES-3803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17578495#comment-17578495
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Benoit Tellier commented on JAMES-3803:
---------------------------------------
I took a jstack capture, that I attached.
I can hardly make sense of it, RemoteDelivery-* threads are waiting, so
available, though the deadlock seems to appear on ActiveMQ... Quite weird.
> DeliveryRunnable blocks email in BoundedElasticScheduler-queue if running out
> of threads
> ----------------------------------------------------------------------------------------
>
> Key: JAMES-3803
> URL: https://issues.apache.org/jira/browse/JAMES-3803
> Project: James Server
> Issue Type: Bug
> Components: Remote Delivery
> Affects Versions: 3.7.0
> Reporter: Adrian Bucher
> Priority: Major
> Attachments: jstack-of-the-bug.txt
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> The DeliveryRunnable does use the same BoundedElasticScheduler (ThreadPool)
> for dequeuing the messages (long running thread), and processing (delivering)
> them, if lots of messages are dequeued and the BoundedElasticScheduler starts
> to queue them, the one queueing behind the dequeuing - long running thread
> are never processed nor delivered.
>
> Messages are still visible in the embedded activemq delivery queues, a
> restart of the james will process them, as they will be reacknoledged by the
> dequeuer.
>
>
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