NameNode format doesn't pick up dfs.namenode.name.dir.NameServiceId configure
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                 Key: HDFS-3013
                 URL: https://issues.apache.org/jira/browse/HDFS-3013
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: ha, name-node
    Affects Versions: 0.23.0, HA branch (HDFS-1623)
            Reporter: Mingjie Lai


One problem I observed at HA branch is that namenode -format doesn't pick up 
the right configured dfs.namenode.name.dir.NameServiceId. In this case, 
``namenode -format'' will format the default directory instead of the 
configured one, while namenode will use the correct one. 

The root cause is that NameNode.initializeGenericKeys() is only invoked at the 
NameNode constructor. So it doesn't get called by static methods like format 
and finalize. 

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