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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3224) Bug in check for DN re-registration with different storage ID
Date Wed, 10 Oct 2012 21:41:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Lowe updated HDFS-3224:
-----------------------------

       Resolution: Fixed
    Fix Version/s: 2.0.3-alpha
           Status: Resolved  (was: Patch Available)

I committed this to trunk and branch-2.  Will post patch for branch-0.23 shortly.
                
> 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
>            Assignee: Jason Lowe
>            Priority: Minor
>             Fix For: 2.0.3-alpha
>
>         Attachments: HDFS-3224.patch, HDFS-3224.patch, HDFS-3224.patch, HDFS-3224.patch
>
>
> 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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