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https://issues.apache.org/jira/browse/HADOOP-17611?focusedWorklogId=581116&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-581116
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ASF GitHub Bot logged work on HADOOP-17611:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 12/Apr/21 16:15
Start Date: 12/Apr/21 16:15
Worklog Time Spent: 10m
Work Description: amaroti opened a new pull request #2897:
URL: https://github.com/apache/hadoop/pull/2897
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Issue Time Tracking
-------------------
Worklog Id: (was: 581116)
Time Spent: 1h 50m (was: 1h 40m)
> Distcp parallel file copy breaks the modification time
> ------------------------------------------------------
>
> Key: HADOOP-17611
> URL: https://issues.apache.org/jira/browse/HADOOP-17611
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Adam Maroti
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> The commit HADOOP-11794. Enable distcp to copy blocks in parallel.
> (bf3fb585aaf2b179836e139c041fc87920a3c886) broke the modification time of
> large files.
>
> In CopyCommitter.java inside concatFileChunks Filesystem.concat is called
> which changes the modification time therefore the modification times of files
> copeid by distcp will not match the source files. However this only occurs
> for large enough files, which are copied by splitting them up by distcp.
> In concatFileChunks before calling concat extract the modification time and
> apply that to the concatenated result-file after the concat. (probably best
> -after- before the rename()).
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