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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3164) Move DatanodeInfo#hostName to DatanodeID
Date Fri, 30 Mar 2012 00:27:27 GMT
Move DatanodeInfo#hostName to DatanodeID
----------------------------------------

                 Key: HDFS-3164
                 URL: https://issues.apache.org/jira/browse/HDFS-3164
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: data-node
            Reporter: Eli Collins
            Assignee: Eli Collins


Like HDFS-3138 (the ipcPort) the hostName field in DatanodeInfo is not ephemeral and should
be in DatanodeID. This also allows us to fixup the issue where the DatanodeID#name field is
overloaded (the DN sets it to a hostname, then the NN clobbers it with an IP, and then the
DN clobbers it's hostname field with this IP). If the DN can specify both a "name" and "hostname"
in the DatanodeID then this code becomes simpler. 

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