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https://issues.apache.org/jira/browse/HADOOP-6566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833749#action_12833749
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Steve Loughran commented on HADOOP-6566:
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Devaraj, this code isn't in Hadoop, it's in the stuff I wrap the Hadoop daemon
classes with: for the different services (NN, DN, etc) I create different
directory lists and validate them. Hence the inconsistent indentation with the
main Hadoop codebase.
I think something like this can go into hadoop-core, one less thing for me to
worry about, though the new URI-driven directory lists probably complicates the
logic. I suspect this code only works for non-URI lists.
> Hadoop daemons should not start up if the ownership/permissions on the
> directories used at runtime are misconfigured
> --------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-6566
> URL: https://issues.apache.org/jira/browse/HADOOP-6566
> Project: Hadoop Common
> Issue Type: New Feature
> Components: security
> Reporter: Devaraj Das
> Fix For: 0.22.0
>
>
> The Hadoop daemons (like datanode, namenode) should refuse to start up if the
> ownership/permissions on directories they use at runtime are misconfigured or
> they are not as expected. For example, the local directory where the
> filesystem image is stored should be owned by the user running the namenode
> process and should be only readable by that user. We can provide this feature
> in common and HDFS and MapReduce can use the same.
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