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https://issues.apache.org/jira/browse/HADOOP-18582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ayush Saxena resolved HADOOP-18582.
-----------------------------------
Hadoop Flags: Reviewed
Resolution: Fixed
> No need to clean tmp files in distcp direct mode
> ------------------------------------------------
>
> Key: HADOOP-18582
> URL: https://issues.apache.org/jira/browse/HADOOP-18582
> Project: Hadoop Common
> Issue Type: Bug
> Components: tools/distcp
> Affects Versions: 3.3.4
> Reporter: 10000kang
> Assignee: 10000kang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.9
>
>
> it not necessary to do `cleanupTempFiles` while ditcp commit job in direct
> mode, because it there is no temp files in direct mode.
> This clean operation will increase the task execution time, because it will
> get the list of files in the target path. When the number of files in the
> target path is very large, this operation will be very slow.
> *note* there are two patches which need to be cherrypicked when picking this
> up; the original patch and a followup, both with HADOOP-18582 in the title
> {code}
> 3b7b79b37ae HADOOP-18582. skip unnecessary cleanup logic in distcp (#5251)
> e8a6b2c2c4e HADOOP-18582. Addendum: Skip unnecessary cleanup logic in DistCp.
> {code}
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