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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3231) NN Host2NodesMap should use hostnames
Date Mon, 09 Apr 2012 20:17:20 GMT
NN Host2NodesMap should use hostnames
-------------------------------------

                 Key: HDFS-3231
                 URL: https://issues.apache.org/jira/browse/HDFS-3231
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Eli Collins
            Assignee: Eli Collins


The NN's Host2NodesMap maps "host names" to datanode descriptors. It actually uses IP addresses
and should use hostnames instead, as hostnames are a better key (eg a Datanode has one hostname
but may have multiple IPs). Per HDFS-3216 there's actually a bug in that it's sometimes accessed
with IP:port instead of IP, so that jira should be fixed  before this one.

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