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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3415) Non-AM containers can be counted towards amResourceUsage of a fairscheduler queue
Date Wed, 01 Apr 2015 22:29:53 GMT

    [ https://issues.apache.org/jira/browse/YARN-3415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391624#comment-14391624
] 

Sandy Ryza commented on YARN-3415:
----------------------------------

[~ragarwal] did you have any more comments before I commit this?

> Non-AM containers can be counted towards amResourceUsage of a fairscheduler queue
> ---------------------------------------------------------------------------------
>
>                 Key: YARN-3415
>                 URL: https://issues.apache.org/jira/browse/YARN-3415
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.6.0
>            Reporter: Rohit Agarwal
>            Assignee: zhihai xu
>            Priority: Critical
>         Attachments: YARN-3415.000.patch, YARN-3415.001.patch
>
>
> We encountered this problem while running a spark cluster. The amResourceUsage for a
queue became artificially high and then the cluster got deadlocked because the maxAMShare
constrain kicked in and no new AM got admitted to the cluster.
> I have described the problem in detail here: https://github.com/apache/spark/pull/5233#issuecomment-87160289
> In summary - the condition for adding the container's memory towards amResourceUsage
is fragile. It depends on the number of live containers belonging to the app. We saw that
the spark AM went down without explicitly releasing its requested containers and then one
of those containers memory was counted towards amResource.
> cc - [~sandyr]



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