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https://issues.apache.org/jira/browse/MAPREDUCE-5888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13996622#comment-13996622
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Jonathan Eagles commented on MAPREDUCE-5888:
--------------------------------------------
pending Hadoop QA +1
> Failed job leaves hung AM after it unregisters
> -----------------------------------------------
>
> Key: MAPREDUCE-5888
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5888
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mr-am
> Affects Versions: 2.2.0
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Attachments: MAPREDUCE-5888.patch
>
>
> When a job fails the AM hangs during shutdown. A non-daemon thread pool
> executor thread prevents the JVM teardown from completing, and the AM lingers
> on the cluster for the AM expiry interval in the FINISHING state until
> eventually the RM expires it and kills the container. If application limits
> on the queue are relatively low (e.g.: small queue or small cluster) this can
> cause unnecessary delays in resource scheduling on the cluster.
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