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Date: Sat, 25 Jan 2014 01:38:38 +0000 (UTC)
From: "Karthik Kambatla (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12691175.1390613902169.10326.1390613918304@arcas>
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Subject: [jira] [Created] (YARN-1641) ZK store - periodically create a dummy
 file to kick in fencing
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Karthik Kambatla created YARN-1641:
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             Summary: ZK store - periodically create a dummy file to kick in fencing
                 Key: YARN-1641
                 URL: https://issues.apache.org/jira/browse/YARN-1641
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: resourcemanager
    Affects Versions: 2.4.0
            Reporter: Karthik Kambatla
            Assignee: Karthik Kambatla


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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