[HDFS-1560] dfs.data.dir permissions should default to 700

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.22.0, 0.23.0
• Fix Version/s: 0.22.0, 0.23.0
• Component/s: datanode
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: The permissions on datanode data directories (configured by dfs.datanode.data.dir.perm) now default to 0700. Upon startup, the datanode will automatically change the permissions to match the configured value.
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 27/Dec/10 03:27
• Updated: 21/Apr/11 23:32
• Resolved: 27/Dec/10 22:08

Description

Currently, dfs.data.dir defaults to 755 permissions, which isn't necessary for any reason, and is a security issue if not changed on a secured cluster. We should default to 700