[YARN-3784] Indicate preemption timout along with the list of containers to AM (preemption message)

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: scheduler preemption
• Labels: oct16-hard
• Assignee: Sunil G
• Reporter: Sunil G
• Created: 08/Jun/15 14:46
• Updated: 25/Oct/19 20:27

Description

Currently during preemption, AM is notified with a list of containers which are marked for preemption. Introducing a timeout duration also along with this container list so that AM can know how much time it will get to do a graceful shutdown to its containers (assuming one of preemption policy is loaded in AM).
This will help in decommissioning NM scenarios, where NM will be decommissioned after a timeout (also killing containers on it). This timeout will be helpful to indicate AM that those containers can be killed by RM forcefully after the timeout.

Issue Links

• relates to: YARN-3224 Notify AM with containers (on decommissioning node) could be preempted after timeout.