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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3224) Bug in check for DN re-registration with different storage ID
Date Fri, 06 Apr 2012 20:19:22 GMT
Bug in check for DN re-registration with different storage ID
-------------------------------------------------------------

                 Key: HDFS-3224
                 URL: https://issues.apache.org/jira/browse/HDFS-3224
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Eli Collins
            Priority: Minor


DatanodeManager#registerDatanode checks the host to node map using an IP:port key, however
the map is keyed on IP, so this check will always fail. It's performing the check to determine
if a DN with the same IP and storage ID has already registered, and if so to remove this DN
from the map and indicate that eg it's no longer hosting these blocks. This bug has been here
forever.

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