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From "Tanping Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2086) If the include hosts list contains host name, after restarting namenode, datanodes registrant is denied
Date Mon, 20 Jun 2011 21:54:47 GMT
If the include hosts list contains host name, after restarting namenode, datanodes registrant
is denied 
--------------------------------------------------------------------------------------------------------

                 Key: HDFS-2086
                 URL: https://issues.apache.org/jira/browse/HDFS-2086
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Tanping Wang


As the tile describes the problem:  if the include host list contains host name, after restarting
namenodes, the datanodes registrant is denied by namenodes.  This is because after namenode
is restarted, the still alive data node will try to register itself with the namenode and
it identifies itself with its *IP address*.  However, namenode only allows all the hosts in
its hosts list to registrant and all of them are hostnames. So namenode would deny the datanode
registration.


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