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https://issues.apache.org/jira/browse/ARTEMIS-2174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Bertram updated ARTEMIS-2174:
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Fix Version/s: 2.7.0
> Broker reconnect to another with scale down policy cause OOM
> ------------------------------------------------------------
>
> Key: ARTEMIS-2174
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2174
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Affects Versions: 2.6.3
> Reporter: Howard Gao
> Assignee: Howard Gao
> Priority: Major
> Fix For: 2.7.0, 2.6.4
>
>
> When a node tries to reconnects to another node in a scale down cluster, the
> reconnect request gets denied by the other node and keeps retrying, which
> causes tasks in the ordered executor accumulate and eventually OOM.
> To reproduce:
> # Start 2 nodes (node1 and 2) cluster configured in scale down mode.
> # stop node2 and restart it.
> # node1 will try to reconnect to node2 repeatedly and ever succeed.
> # Inspect the connecting ClientSessionFactory (like adding log) and its
> threadpool (closeExecutor an object of OrderedExecutor) keeps adding tasks to
> its queue.
> Over the time the queue keeps ever growing, and will exhaust the heap memory.
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