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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4685) Disable AM blacklisting by default to mitigate situations that application get hanged
Date Sat, 20 Aug 2016 00:01:36 GMT

    [ https://issues.apache.org/jira/browse/YARN-4685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15429084#comment-15429084
] 

Hudson commented on YARN-4685:
------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10313 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/10313/])
YARN-4685. Disable AM blacklisting by default to mitigate situations (wangda: rev 2da32a6ef9edebd86ca9672d10ce35b5a46818cc)
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java


> Disable AM blacklisting by default to mitigate situations that application get hanged
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-4685
>                 URL: https://issues.apache.org/jira/browse/YARN-4685
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.8.0
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>            Priority: Critical
>         Attachments: YARN-4685-workaround.patch, YARN-4685.patch
>
>
> AM blacklist addition or removal is updated only when RMAppAttempt is scheduled i.e {{RMAppAttemptImpl#ScheduleTransition#transition}}.
But once attempt is scheduled if there is any removeNode/addNode in cluster then this is not
updated to {{BlackListManager#refreshNodeHostCount}}. This leads BlackListManager to operate
on stale NM's count. And application is in ACCEPTED state and wait forever even if blacklisted
nodes are reconnected with clearing disk space.



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