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Posted to issues@activemq.apache.org by "Josh Byster (Jira)" <ji...@apache.org> on 2025/04/04 19:01:00 UTC

[jira] [Created] (ARTEMIS-5383) Performance issues with HierarchalObjectRepository#unRegisterListener

Josh Byster created ARTEMIS-5383:
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             Summary: Performance issues with HierarchalObjectRepository#unRegisterListener
                 Key: ARTEMIS-5383
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-5383
             Project: ActiveMQ Artemis
          Issue Type: Task
    Affects Versions: 2.37.0
            Reporter: Josh Byster


On brokers with many queues, we find that upon disconnects of many components simultaneously, the broker immediately begins to slow. My suspicion is due to the queue auto-deletion behavior, where we do an ArrayList#remove(Object) in HierarchalObjectRepository#unRegisterListener which I believe is linear at least in the number of queues. With over a million queues, this becomes incredibly slow. Perhaps we can optimize the find of these listeners (maybe a map with an ID)?



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