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List:       activemq-users
Subject:    Re: Artemis 2.9.0 Deadlock
From:       brusdev <bruscinodf () gmail ! com>
Date:       2020-03-21 0:48:19
Message-ID: 1584751699967-0.post () n4 ! nabble ! com
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Hi,

I can't reproduce this issue against Artemis 2.11.0 because this issue was
already fixed by Clebert with ARTEMIS-2592.

Before the fix, the QueueImpl.removeConsumer locks the queue until the
deleting of auto-create queue.
The deleting of a queue calls ManagementServiceImpl.unregisterQueue that is
synchronized and this can cause the deadlock.

After the fix, QueueManagerImpl has an executor so the deleting of
auto-create queue isn't executed in the same thread of
QueueImpl.removeConsumer and this prevents the deadlock.

Regards,
Domenico



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