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From "Rick Branson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3543) Infinite hang during shutdown
Date Wed, 30 Nov 2011 20:31:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13160307#comment-13160307
] 

Rick Branson commented on CASSANDRA-3543:
-----------------------------------------

This is a bug in the new commit log allocator from #3411. The MutationStage threads are all
blocked because the CommitLogExecutor queue is full. The COMMIT-LOG-WRITER thread which drains
this queue is blocking on fetchSegment() which waits on CommitLogAllocator to push newly created
segments onto this queue. Brandon also stated that only 1 commit log segment existed afterwards.
                
> Infinite hang during shutdown
> -----------------------------
>
>                 Key: CASSANDRA-3543
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3543
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Brandon Williams
>         Attachments: hung_stack.txt
>
>
> While testing CASSANDRA-3541 at some point stress completely timed out.  I proceeded
to shut the cluster down and 2/3 JVMs hang infinitely.  After a while, one of them logged:
> {noformat}
> WARN 19:07:50,133 Some hints were not written before shutdown.  This is not supposed
to happen.  You should (a) run repair, and (b) file a bug report
> {noformat}

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