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https://issues.apache.org/jira/browse/HDFS-4918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13687656#comment-13687656
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Tsz Wo (Nicholas), SZE commented on HDFS-4918:
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> ... This explanation might provide some more context to how it affects MR
> jobs ...
Out of my curiosity, why disable permission in your cluster? I beg most
existing libraries such as the MR code assume permission is enabled and do not
handle the case that permission is disabled.
> HDFS permission check is incorrect
> ----------------------------------
>
> Key: HDFS-4918
> URL: https://issues.apache.org/jira/browse/HDFS-4918
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client, namenode
> Affects Versions: 2.0.0-alpha
> Reporter: Fengdong Yu
>
> HDFS permisson check is incorrect, even if dfs.permissions is set false. it
> does look like this was caused by snap shot.
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