Eric Payne created YARN-4390:
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Summary: Consider container request size during CS preemption
Key: YARN-4390
URL: https://issues.apache.org/jira/browse/YARN-4390
Project: Hadoop YARN
Issue Type: Bug
Components: capacity scheduler
Affects Versions: 3.0.0, 2.8.0, 2.7.3
Reporter: Eric Payne
Assignee: Eric Payne
There are multiple reasons why preemption could unnecessarily preempt
containers. One is that an app could be requesting a large container (say
8-GB), and the preemption monitor could conceivably preempt multiple containers
(say 8, 1-GB containers) in order to fill the large container request. These
smaller containers would then be rejected by the requesting AM and potentially
given right back to the preempted app.
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