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https://issues.apache.org/jira/browse/MAPREDUCE-4397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13648895#comment-13648895
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Luke Lu commented on MAPREDUCE-4397:
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As I mentioned in MAPREDUCE-5202 and the security mailing list, this feature
and its equivalent for YARN do NOT "really" weakens security on a properly
configured cluster.
> Introduce HADOOP_SECURITY_CONF_DIR for task-controller
> ------------------------------------------------------
>
> Key: MAPREDUCE-4397
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4397
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: task-controller
> Reporter: Luke Lu
> Assignee: Yu Gao
> Fix For: 1.1.2
>
> Attachments: mapreduce-4397-branch-1.patch, test-patch.result
>
>
> The linux task controller currently hard codes the directory in which to look
> for its config file at compile time (via the HADOOP_CONF_DIR macro). Adding a
> new environment variable to look for task-controller's conf dir (with strict
> permission checks) would make installation much more flexible.
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