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https://issues.apache.org/jira/browse/HADOOP-4202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris K Wensel updated HADOOP-4202:
-----------------------------------
Attachment: hadoop-4202.patch
Have updated the daemon threads to check the 'running' state, and if not
running, will silently exit. to do this, a couple threads are now calling
poll() instead of take(), with a timeout of 10 seconds. this value is
arbitrary.
I haven't added a test case to guaranteed the threads are gone as this patch is
so MiniMRCluster behaves a little better. and it looks like lifecycle
interfaces will be added in a future patch. please advise otherwise.
> TaskTracker never stops cleanup threads, MiniMRCluster becomes unstable
> -----------------------------------------------------------------------
>
> Key: HADOOP-4202
> URL: https://issues.apache.org/jira/browse/HADOOP-4202
> Project: Hadoop Core
> Issue Type: Bug
> Components: test
> Affects Versions: 0.18.0
> Reporter: Chris K Wensel
> Assignee: Chris K Wensel
> Attachments: hadoop-4202.patch
>
>
> If many unit tests start/stop unique MiniMRCluster instances, over time the
> number of threads in the test vm grow to large causing tests to hang and/or
> slow down.
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