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https://issues.apache.org/jira/browse/MAPREDUCE-1979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926143#action_12926143
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Hudson commented on MAPREDUCE-1979:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #523 (See
[https://hudson.apache.org/hudson/job/Hadoop-Mapreduce-trunk-Commit/523/])
> "Output directory already exists" error in gridmix when
> gridmix.output.directory is not defined
> -----------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1979
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1979
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/gridmix
> Reporter: Ravi Gummadi
> Assignee: Ravi Gummadi
> Fix For: 0.22.0
>
> Attachments: 1979.patch, 1979.v1.1.patch, 1979.v1.2.patch,
> 1979.v1.3.patch, 1979.v1.patch
>
>
> "Output directory already exists" error is seen in gridmix when
> gridmix.output.directory is not defined. When gridmix.output.directory is not
> defined, then gridmix uses inputDir/gridmix/ as output path for gridmix run.
> Because gridmix is creating outputPath(in this case, inputDir/gridmix/) at
> the begining, the output path to generate-data-mapreduce-job(i.e. inputDir)
> already exists and becomes error from mapreduce.
> There is need for creation of this outputPath in any case(whether user
> specifies the path using gridmix.output.directory OR gridmix itself
> considering inputDir/gridmix/ ) even though the paths are automatically
> created for output paths of mapreduce jobs(like mkdir -p), because gridmix
> needs to set 777 permissions for this outputPath sothat different users can
> create different output directories of different mapreduce jobs within this
> gridmix run.
> The other case in which this problem is seen is when gridmix.output.directory
> is defined as a relative path. This is because in this case also, gridmix
> tries to create relative path under ioPath/ and thus the same issue.
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