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https://issues.apache.org/jira/browse/MAPREDUCE-1186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796531#action_12796531
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Hemanth Yamijala commented on MAPREDUCE-1186:
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I originally thought if 2a and 2b should be the same, except that ownership
would be different if the DefaultTaskController is used. However, since we do
not enforce exclusive group ownership for the TT in the DefaultTaskController
case, we might end up opening the group permissions on localized files and make
it less private than Amarsri's proposal.
So, I am +1 for the proposal above.
> While localizing a DistributedCache file, TT sets permissions recursively on
> the whole base-dir
> -----------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1186
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1186
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.21.0
> Reporter: Vinod K V
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.22.0
>
> Attachments: patch-1186-1.txt, patch-1186-2.txt,
> patch-1186-3-ydist.txt, patch-1186-3-ydist.txt, patch-1186-3.txt,
> patch-1186-ydist.txt, patch-1186-ydist.txt, patch-1186.txt
>
>
> This is a performance problem.
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