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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2193) The NN should determine its own hostname using the same method as the DN
Date Mon, 25 Jul 2011 21:10:09 GMT
The NN should determine its own hostname using the same method as the DN
------------------------------------------------------------------------

                 Key: HDFS-2193
                 URL: https://issues.apache.org/jira/browse/HDFS-2193
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node, security
    Affects Versions: 0.23.0
            Reporter: Aaron T. Myers
            Assignee: Aaron T. Myers


When the "{{_HOST}}" replacement feature of Kerberos principal names is used, the various
Hadoop daemons must determine their own canonical hostname in order to form their principal
name.

Presently, the NN determines its own hostname based on the configured value of "{{fs.default.name}}",
whereas the DNs determine their hostnames based on the result of "{{InetAddress.getLocalHost().getCanonicalHostName()}}".
This asymmetry can cause confusion during configuration of a secure cluster.

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