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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9715) Check storage ID uniqueness on datanode startup
Date Wed, 03 Feb 2016 02:17:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinayakumar B updated HDFS-9715:
--------------------------------
          Resolution: Fixed
        Hadoop Flags: Reviewed
       Fix Version/s: 2.8.0
    Target Version/s:   (was: 3.0.0)
              Status: Resolved  (was: Patch Available)

Committed to trunk, branch-2 and branch-2.8.
Thanks for the contribution [~eddyxu],
Thanks [~andrew.wang] for review.

> Check storage ID uniqueness on datanode startup
> -----------------------------------------------
>
>                 Key: HDFS-9715
>                 URL: https://issues.apache.org/jira/browse/HDFS-9715
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.7.2
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>             Fix For: 2.8.0
>
>         Attachments: HDFS-9715.00.patch, HDFS-9715.01.patch, HDFS-9715.02.patch, HDFS-9715.03.patch
>
>
> We should fix this to check storage ID uniqueness on datanode startup. If someone has
manually edited the storage ID files, or if they have duplicated a directory (or re-added
an old disk) they could end up with a duplicate storage ID and not realize it. 
> The HDFS-7575 fix does generate storage UUID for each storage, but not checks the uniqueness
of these UUIDs.



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