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From "Nate Edel (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-11824) HDFS client and YARN should check for elected master with Zookeeper
Date Fri, 10 Apr 2015 19:01:12 GMT
Nate Edel created HADOOP-11824:
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             Summary: HDFS client and YARN should check for elected master with Zookeeper
                 Key: HADOOP-11824
                 URL: https://issues.apache.org/jira/browse/HADOOP-11824
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Nate Edel
            Assignee: Nate Edel


When trying to connect to a NameNode (DFS) or Resource Manager (Yarn), clients will try multiple
connections in order to find the elected master node.  Clients should instead check the relevant
znode in zookeeper.

This will be especially valuable in DFS after HDFS-6440 is adopted, as the worst case scenario
in the DFS client will then be testing the 5 standby nodes in order before finding the master.



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