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https://issues.apache.org/jira/browse/MAPREDUCE-7287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17167738#comment-17167738
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zhengchenyu commented on MAPREDUCE-7287:
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[~ste...@apache.org]
I Found the problem is computeSourceRootPath. When list source, distCpContext's
src is real srcPath ,distCpContext's target is real targetPath. But when
listTargetFiles, target is a not exists file. So computeSourceRootPath result
diffrent file, in my case computeSourceRootPath return '/tmp/a' when list
source, but return '/tmp' when list target. It result to diffrent filename in
sequence file.
And I think when construct DistCpOptions for listTargetFiles, we should set
targetPath to targetFinalPath, but not resultNonePath. Here I sumit
MAPREDUCE-7287.001.patch. Please help me review, thanks.
> Distcp will delete exists file , If we use "--delete and --update" options
> and distcp file.
> --------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7287
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7287
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distcp
> Affects Versions: 3.2.1
> Reporter: zhengchenyu
> Priority: Major
> Fix For: 3.3.1
>
> Attachments: MAPREDUCE-7287.001.patch
>
>
> hdfs://ns1/tmp/a is an existing file, hdfs://ns2/tmp/a is also an existing
> file.
> When I run this command,
> {code:java}
> hadoop distcp -delete -update hdfs://ns1/tmp/a hdfs://ns2/tmp/a
> {code}
> I Found hdfs://ns2/tmp/a is deleted unpectectedly.
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