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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-645) When disctp is used to overwrite a file, it should return immediately with an error message
Date Thu, 27 Aug 2009 16:54:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748443#action_12748443

Hadoop QA commented on MAPREDUCE-645:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 808351.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-vesta.apache.org/528/console

This message is automatically generated.

> When disctp is used to overwrite a file, it should return immediately with an error message
> -------------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-645
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-645
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: distcp
>            Reporter: Ramya R
>            Assignee: Ravi Gummadi
>            Priority: Minor
>         Attachments: d_645.patch, distcp.txt
> When disctp is triggered to copy a directory to an already existing file, it just shows
a "copy failed" error message after 4 attempts without showing any useful error message. This
is extremely time consuming on a large cluster and especially when the directory being copied
contains several sub-directories.
> Instead, it would be an improvement if distcp could return immediately displaying a useful
error message when an user attempts such an operation. (This is an unlikely situation but
still a valid test case)

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