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https://issues.apache.org/jira/browse/MAPREDUCE-2021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12902096#action_12902096
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Scott Chen commented on MAPREDUCE-2021:
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Looks good. We will need this change too.
One nitpick: Can you also change the comments in the beginning of
testSplitPlacement() which describe how files are created?
> CombineFileInputFormat returns duplicate hostnames in split locations
> ----------------------------------------------------------------------
>
> Key: MAPREDUCE-2021
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2021
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: client
> Affects Versions: 0.20.2
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.22.0
>
> Attachments: patch-2021-ydist.txt, patch-2021.txt
>
>
> CombineFileInputFormat.getSplits creates splits with duplicate locations. It
> adds locations of the files in the split to an ArrayList; if all the files
> are on same location, the location is added again and again. Instead, it
> should add it to a Set instead of List to avoid duplicates.
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