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https://issues.apache.org/jira/browse/CASSANDRA-3335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13124374#comment-13124374
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Brandon Williams commented on CASSANDRA-3335:
---------------------------------------------

+1 on this patch for being technically correct, but it actually does not help.  
What I see is OptionalTasks jump to 100% on control-c, and then eventually it 
spins down and a few minutes later java finally exits.  During the last bit, I 
can see jamm still working.  I'm not sure why java is taking so long to exit, 
but it is responsive to nodetool the entire time, though tpstats shows nothing 
active.
                
> ThreadPoolExecutor creates threads as non-daemon and will block on shutdown 
> by default
> --------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3335
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3335
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Brandon Williams
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.0.1
>
>         Attachments: 3335.txt
>
>
> This is most obviously visible in OptionalTasks which should not block 
> shutdown, but often does.

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