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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3096) dfs.datanode.data.dir.perm is set to 755 instead of 700
Date Thu, 18 Oct 2012 08:16:05 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt Foley updated HDFS-3096:
-----------------------------

    Target Version/s: 2.0.0-alpha, 1.1.1  (was: 1.1.0, 2.0.0-alpha)
    
> dfs.datanode.data.dir.perm is set to 755 instead of 700
> -------------------------------------------------------
>
>                 Key: HDFS-3096
>                 URL: https://issues.apache.org/jira/browse/HDFS-3096
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.23.0, 1.0.0
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>
> dfs.datanode.data.dir.perm is used by the datanode to set the permissions of it data
directories. This is set by default to 755 which gives read permissions to everyone to that
directory, opening up possibility of reading the data blocks by anyone in a secure cluster.
Admins can over-ride this config but its sub-optimal practice for the default to be weak.
IMO, the default should be strong and the admins can relax it if necessary.
> The fix is to change default permissions to 700.

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