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Posted to hdfs-dev@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2013/11/08 02:02:19 UTC

[jira] [Resolved] (HDFS-5475) NN incorrectly tracks more than one replica per DN

     [ https://issues.apache.org/jira/browse/HDFS-5475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arpit Agarwal resolved HDFS-5475.
---------------------------------

       Resolution: Fixed
    Fix Version/s: Heterogeneous Storage (HDFS-2832)

Thanks for the quick review Nicholas!

I committed it to branch HDFS-2832.

> NN incorrectly tracks more than one replica per DN
> --------------------------------------------------
>
>                 Key: HDFS-5475
>                 URL: https://issues.apache.org/jira/browse/HDFS-5475
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: Heterogeneous Storage (HDFS-2832)
>            Reporter: Arpit Agarwal
>            Assignee: Arpit Agarwal
>             Fix For: Heterogeneous Storage (HDFS-2832)
>
>         Attachments: h5475.01.patch
>
>
> NN chooses a provisional target storage when allocating a new block and records that block in the blockList of that storage. However the datanode is free to choose a different storage for the block. On the next block report the NN ends up with two blockList entries for the same replica+DN combination.



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