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https://issues.apache.org/jira/browse/HADOOP-8894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471972#comment-13471972
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Eli Collins commented on HADOOP-8894:
-------------------------------------
+1
> GenericTestUtils.waitFor should dump thread stacks on timeout
> -------------------------------------------------------------
>
> Key: HADOOP-8894
> URL: https://issues.apache.org/jira/browse/HADOOP-8894
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8894.txt, hadoop-8894.txt
>
>
> Many tests use this utility to wait for a condition to become true. In the
> event that it times out, we should dump all the thread stack traces, in case
> the timeout was due to a deadlock. This should make it easier to debug
> scenarios like HDFS-4001.
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