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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1641) ZK store should attempt a write periodically to ensure it is still Active
Date Wed, 12 Feb 2014 07:48:19 GMT

    [ https://issues.apache.org/jira/browse/YARN-1641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898895#comment-13898895
] 

Sandy Ryza commented on YARN-1641:
----------------------------------

+1

> ZK store should attempt a write periodically to ensure it is still Active
> -------------------------------------------------------------------------
>
>                 Key: YARN-1641
>                 URL: https://issues.apache.org/jira/browse/YARN-1641
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.3.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: yarn-1641-1.patch, yarn-1641-2.patch
>
>
> Fencing in ZK store kicks in when the RM tries to write something to the store. If the
RM doesn't write anything to the store, it doesn't get fenced and can continue to assume being
the Active. 
> By periodically writing a file (say, every RM_ZK_TIMEOUT_MS seconds), we can ensure it
gets fenced.



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