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Date: Sat, 12 Apr 2014 07:20:15 +0000 (UTC)
From: "Rohith (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12708080.1397287202133.105208.1397287215252@arcas>
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Subject: [jira] [Created] (YARN-1934) Potential NPE in ZKRMStateStore caused
 by handling Disconnected event from ZK.
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Rohith created YARN-1934:
----------------------------

             Summary: Potential NPE in ZKRMStateStore caused by handling Disconnected event from ZK.
                 Key: YARN-1934
                 URL: https://issues.apache.org/jira/browse/YARN-1934
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.4.0
            Reporter: Rohith
            Priority: Critical


For ZK disconnected event , zkClient is set to null. It is very much prone to throw NPE.

{noformat}
        case Disconnected:
          LOG.info("ZKRMStateStore Session disconnected");
          oldZkClient = zkClient;
          zkClient = null;
          break;
{noformat}


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