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https://issues.apache.org/jira/browse/HADOOP-4783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681596#action_12681596
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Hemanth Yamijala commented on HADOOP-4783:
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I had an offline discussion with Rajiv on this. We felt that for the time being
740 for files and 750 for the history directory should be sufficient.
> History files are given world readable permissions.
> ---------------------------------------------------
>
> Key: HADOOP-4783
> URL: https://issues.apache.org/jira/browse/HADOOP-4783
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.19.0
> Reporter: Hemanth Yamijala
> Assignee: Amareshwari Sriramadasu
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: patch-4783-1.txt, patch-4783.txt
>
>
> It is found that history files are being created with permissions 0777. On
> shared clusters this is opening up too much. However, there is a requirement
> to allow Chukwa to read history files. (See HADOOP-4705). This issue is to
> set up appropriate permissions for the files to be as restrictive as
> required, while still fixing the problem for Chukwa.
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