[AMBARI-17888] Create configuration flag to prevent changing of directory permissions

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.2
• Fix Version/s: 2.4.0
• Component/s: ambari-agent
• Assignee: Siddharth Wagle
• Reporter: Siddharth Wagle
• Created: 25/Jul/16 17:03
• Updated: 16/Aug/16 17:50
• Resolved: 16/Aug/16 02:36

Description

A common method of addressing failed disks, which is to set unwritable permissions on a directory such as /hadoop10 within the root filesystem.

Once mounted, the mounted filesystem will overlay the correct permissions structure, allowing hdfs to write to the mounted disk.

In the case of a failed mount operation, the associated /hadoop10 directory will be unwritable by hdfs.

However, Ambari will see the visible directory with incorrect permissions, and "fix" the permissions back to a writable directory-- resulting in the datanode filling the root partition of a machine.

We need to prevent ambari from changing permissions on YARN local and HDFS data dirs.

Issue Links

• links to: Review board