[YARN-5765] Revert CHMOD on the new dirs created-LinuxContainerExecutor creates appcache and its subdirectories with wrong group owner.

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.8.0, 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha2
• Target Version/s: 3.0.0-alpha2
• Hadoop Flags: Reviewed

Release Note

This change reverts YARN-5287 from 3.0.0-alpha1. chmod clears the set-group-ID bit of a regular file hence folder was getting reset with the rights.

• Assignee: Naganarasimha G R
• Reporter: Haibo Chen
• Created: 21/Oct/16 17:49
• Updated: 08/Nov/18 02:29
• Resolved: 16/Nov/16 10:43

Description

Earlier fix for YARN-5287 has been reverted due to this issue : LinuxContainerExecutor creates usercache/{userId}/appcache/{appId} with wrong group owner, causing Log aggregation and ShuffleHandler to fail because node manager process does not have permission to read the files under the directory.
This can be easily reproduced by enabling LCE and submitting a MR example job as a user that does not belong to the same group that NM process belongs to.