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Posted to mapreduce-issues@hadoop.apache.org by "Greg Roelofs (JIRA)" <ji...@apache.org> on 2010/08/20 21:55:16 UTC

[jira] Commented: (MAPREDUCE-2021) CombineFileInputFormat returns duplicate hostnames in split locations

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900839#action_12900839 ] 

Greg Roelofs commented on MAPREDUCE-2021:
-----------------------------------------

Note the similarity to MAPREDUCE-1974.  (Not the same issue, though.)

> 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.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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