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https://issues.apache.org/jira/browse/HADOOP-5599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12696299#action_12696299
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Owen O'Malley commented on HADOOP-5599:
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Did you have the topology defined? If not, there is nothing DFS can do. If so,
the question becomes why blocks ended up with all the replicas on one rack.
> Unable to run jobs when all the nodes in rack are down
> ------------------------------------------------------
>
> Key: HADOOP-5599
> URL: https://issues.apache.org/jira/browse/HADOOP-5599
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.20.0
> Reporter: Ramya R
> Fix For: 0.20.0
>
> Attachments: 5599log.txt
>
>
> Jobs such as randomwriter, sort, validator fail when all the datanodes in a
> rack are down.
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