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https://issues.apache.org/jira/browse/HADOOP-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12503983
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Jim Kellerman commented on HADOOP-1300:
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Why is this bug assigned to me? It doesn't seem relevant to HBase, which is the 
only code I am working on.

> deletion of excess replicas does not take into account 'rack-locality'
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-1300
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1300
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.13.0
>            Reporter: Koji Noguchi
>            Assignee: Hairong Kuang
>             Fix For: 0.14.0
>
>         Attachments: excessDel.patch, excessDel1.patch
>
>
> One rack went down today, resulting in one missing block/file.
> Looking at the log, this block was originally over-replicated. 
> 3 replicas on one rack and 1 replica on another.
> Namenode decided to delete the latter, leaving 3 replicas on the same rack.
> It'll be nice if the deletion is also rack-aware.

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