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https://issues.apache.org/jira/browse/CASSANDRA-16276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17232908#comment-17232908
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Aleksey Yeschenko commented on CASSANDRA-16276:
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Code: https://github.com/iamaleksey/cassandra/commits/16276-4.0 (trivial patch)
> Drain and/or shutdown might throw because of slow messaging service shutdown
> ----------------------------------------------------------------------------
>
> Key: CASSANDRA-16276
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16276
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Startup and Shutdown
> Reporter: Aleksey Yeschenko
> Assignee: Aleksey Yeschenko
> Priority: Normal
> Fix For: 4.0-beta
>
>
> If we invoke nodetool drain before shutdown, it sometimes fails to shut down
> messaging service in time (in this case - timing out the shutdown of the
> eventloopgroup by Netty). But, not before we manage to set isShutdown of
> StorageService to true, despite aborting further drain logic (including
> shutting down mutation stages).
> Then, via on shutdown hook, we invoke drain() method again, implicitly. We
> see that the mutation stage is not shutdown and proceed to assert that
> isShutdown == false, failing that assertion and triggering a second error log
> message.
> The patch merely ensures that any exception thrown by MS shutdown is captured
> so that drain logic can complete the first time around.
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