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https://issues.apache.org/jira/browse/MAPREDUCE-3684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13188550#comment-13188550
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Tom White commented on MAPREDUCE-3684:
--------------------------------------

I couldn't reproduce it with a pi job either - I think Hive was triggering it 
since it uses the distributed cache, which in local mode is where the executor 
service runs and was not being properly shut down.

Thanks for the review - I will commit this soon.
                
> LocalDistributedCacheManager does not shut down its thread pool
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-3684
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3684
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.23.0
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-3684.patch
>
>
> This was observed by running a Hive job in local mode. The job completed but 
> the client process did not exit for 60 seconds.

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