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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2894) HA: disable 2NN when HA is enabled
Date Sat, 04 Feb 2012 23:47:53 GMT
HA: disable 2NN when HA is enabled

                 Key: HDFS-2894
                 URL: https://issues.apache.org/jira/browse/HDFS-2894
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ha
    Affects Versions: HA branch (HDFS-1623)
            Reporter: Eli Collins
            Assignee: Eli Collins

The SecondaryNameNode should log a message and refuse to start if HA is enabled since the
StandbyNode checkpoints by default and IIRC we have not yet enabled the ability to have multiple
checkpointers in the NN.

On the HA branch the 2NN does not currently start from start-dfs.sh because getconf -secondarynamenodes
claims the http-address is not configured even though it is, though this seems like a bug,
in branch 23 getconf will correctly return localhost:50090.


hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs getconf -secondarynamenodes
Incorrect configuration: secondary namenode address dfs.namenode.secondary.http-address is
not configured.

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