[YARN-2809] Implement workaround for linux kernel panic when removing cgroup

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.7.0
• Component/s: nodemanager

Environment

RHEL 6.4

• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Nathan Roberts
• Reporter: Nathan Roberts
• Created: 05/Nov/14 15:39
• Updated: 16/Jul/15 08:16
• Resolved: 10/Feb/15 17:28

Description

Some older versions of linux have a bug that can cause a kernel panic when the LCE attempts to remove a cgroup. It is a race condition so it's a bit rare but on a few thousand node cluster it can result in a couple of panics per day.

This is the commit that likely (haven't verified) fixes the problem in linux: https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-2.6.39.y&id=068c5cc5ac7414a8e9eb7856b4bf3cc4d4744267

Details will be added in comments.