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https://issues.apache.org/jira/browse/MAPREDUCE-4205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267938#comment-13267938
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Tom White commented on MAPREDUCE-4205:
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+1
At first I was confused by the priority ordering - but higher priorities get
shutdown first, so priority 30 shutdown hooks (which this patch introduces),
get shut down before the filesystems (priority 10, from HADOOP-8325).
> retrofit all JVM shutdown hooks to use ShutdownHookManager
> ----------------------------------------------------------
>
> Key: MAPREDUCE-4205
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4205
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Affects Versions: 2.0.0
> Reporter: Alejandro Abdelnur
> Assignee: Alejandro Abdelnur
> Fix For: 2.0.0
>
> Attachments: MAPREDUCE-4205.patch
>
>
> to avoid JVM shutdownhook race conditions, all shutdown hooks should be
> retrofitted to use ShutdownHookManager (HADOOP-8325)
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