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https://issues.apache.org/jira/browse/HDFS-2470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16907425#comment-16907425
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Eric Yang commented on HDFS-2470:
---------------------------------
[~swagle] . Default to 700 is generally a good idea. StorageDirectory is also
used by datanode, and there is a [legacy version of HDFS Short
circuit|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/ShortCircuitLocalReads.html]
read that allows datanode storage directory to be controlled using
dfs.datanode.data.dir.perm config. By using 700 default, it may create
incompatible change to application that depends on legacy HDFS short circuit
read defaults. Directory permission can default to 700 after the code logic
checks against all permissions config with dirType to ensure we don't regress.
> NN should automatically set permissions on dfs.namenode.*.dir
> -------------------------------------------------------------
>
> Key: HDFS-2470
> URL: https://issues.apache.org/jira/browse/HDFS-2470
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.0.0-alpha
> Reporter: Aaron T. Myers
> Assignee: Siddharth Wagle
> Priority: Major
> Attachments: HDFS-2470.01.patch, HDFS-2470.02.patch,
> HDFS-2470.03.patch, HDFS-2470.04.patch, HDFS-2470.05.patch, HDFS-2470.06.patch
>
>
> Much as the DN currently sets the correct permissions for the
> dfs.datanode.data.dir, the NN should do the same for the
> dfs.namenode.(name|edit).dir.
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