Vitaly Brodetskyi created AMBARI-19947:
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Summary: To make sure LLAP preemption happens correctly, should
enable priority-utilization.underutilized-preemption.enabled=true when YARN
preemption is enabled
Key: AMBARI-19947
URL: https://issues.apache.org/jira/browse/AMBARI-19947
Project: Ambari
Issue Type: Bug
Components: ambari-server
Reporter: Vitaly Brodetskyi
Assignee: Vitaly Brodetskyi
Priority: Critical
Fix For: 2.5.0
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.
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