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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8437) Fail/warn if HDFS is setup with an even number of QJMs.
Date Wed, 20 May 2015 02:09:00 GMT
Tsz Wo Nicholas Sze created HDFS-8437:
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             Summary: Fail/warn if HDFS is setup with an even number of QJMs.
                 Key: HDFS-8437
                 URL: https://issues.apache.org/jira/browse/HDFS-8437
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze
            Priority: Minor


When setting an even number (2n, n>1) of QJMs, the number of failure it can tolerate is
the same as one node less (2n-1).  Therefore, it does not make sense to setup with an even
number of QJMs.  We should either fail it or warn the users.



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