[AMBARI-19947] To make sure LLAP preemption happens correctly, should enable priority-utilization.underutilized-preemption.enabled=true when YARN preemption is enabled

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.5.0
• Component/s: ambari-server
• Assignee: Vitaly Brodetskyi
• Reporter: Vitaly Brodetskyi
• Created: 09/Feb/17 18:52
• Updated: 10/Feb/17 13:30
• Resolved: 10/Feb/17 12:54

Description

We requires admin enables YARN preemption to make sure LLAP daemon can be launched in a shared cluster.
And yarn.scheduler.capacity.ordering-policy.priority-utilization.underutilized-preemption.enabled=true need to be set to make preemption can happen under a fragmented cluster.
So once admin enables preemption, we can automatically set yarn.scheduler.capacity.ordering-policy.priority-utilization.underutilized-preemption.enabled to true.
This option (yarn.scheduler.capacity.ordering-policy.priority-utilization.underutilized-preemption.enabled) only supported by HDP-2.6 and after, it has no effect on HDP 2.5 and before.

Issue Links

• links to: review request