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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3232) Cleanup DatanodeInfo vs DatanodeID handling in DN servlets
Date Mon, 09 Apr 2012 20:21:17 GMT
Cleanup DatanodeInfo vs DatanodeID handling in DN servlets

                 Key: HDFS-3232
                 URL: https://issues.apache.org/jira/browse/HDFS-3232
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Eli Collins
            Assignee: Eli Collins
            Priority: Minor

The DN servlets currently have code like the following:
      final String hostname = host instanceof DatanodeInfo 
          ? ((DatanodeInfo)host).getHostName() : host.getIpAddr();

I believe this outdated, that we now always get one or the other (at least when not running
the tests). Need to verify that. We should clean this code up as well, eg always use the IP
(which we'll lookup the FQDN for) since the hostname isn't necessarily valid to put in a URL
(the DN hostname isn't necesarily a FQDN).

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