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https://issues.apache.org/jira/browse/HDFS-4918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13687644#comment-13687644
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Prashant Kommireddi commented on HDFS-4918:
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Agree with Harsh, setPermissions needs to honor isPermissionsEnabled. This
explanation might provide some more context to how it affects MR jobs (not
really related to snapshots) http://search-hadoop.com/m/bKzZK1soPIp
> 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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