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https://issues.apache.org/jira/browse/MAPREDUCE-6121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14609101#comment-14609101
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Robert Kanter commented on MAPREDUCE-6121:
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Actually, I just realized that this affects MR and Common. I think for
bookkeeping purposes, we should split this up into two JIRAs: one to do the
FileUtil and DistCp changes (HADOOP) and one to do the MR change (MAPREDUCE).
> JobSubmitter.compareFs doesn't handle HA namespaces
> ---------------------------------------------------
>
> Key: MAPREDUCE-6121
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6121
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.5.0
> Reporter: Thomas Graves
> Assignee: Ray Chiang
> Attachments: MAPREDUCE-6121.001.patch, MAPREDUCE-6121.002.patch
>
>
> Looking at the JobSubmitter.compareFs it doesn't look like it properly
> handles HA namespaces. The code tries to lookup the hostname using
> InetAddress.getByName, but if you are using namespaces this is going to fail
> and its going to copy the file when it doesn't need to.
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