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https://issues.apache.org/jira/browse/HADOOP-4429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640244#action_12640244
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Tsz Wo (Nicholas), SZE commented on HADOOP-4429:
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> Is this a bug in hadoop?
Currently, "groups" is required external command for Hadoop. So, this is not a
bug. See also the [User
Identity|http://hadoop.apache.org/core/docs/r0.18.1/hdfs_permissions_guide.html]
section in the Permissions User and Administrator Guide.
> Misconfigured UNIX Groups Break Hadoop
> --------------------------------------
>
> Key: HADOOP-4429
> URL: https://issues.apache.org/jira/browse/HADOOP-4429
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Environment: UNIX, Linux
> Reporter: Alex Loddengaard
> Priority: Minor
>
> If a UNIX user has misconfigured groups, either locally or through LDAP, then
> Hadoop will not be able to start.
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