Yufei Gu created YARN-6175:
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Summary: Negative vcore for resource needed to preempt
Key: YARN-6175
URL: https://issues.apache.org/jira/browse/YARN-6175
Project: Hadoop YARN
Issue Type: Bug
Components: fairscheduler
Affects Versions: 3.0.0-alpha2, 2.8.0
Reporter: Yufei Gu
Assignee: Yufei Gu
Both old preemption code (2.8 and before) and new preemption code could have
negative vcores while calculating resources needed to preempt.
For old preemption code would has these message:
{code}
Should preempt <memory:2048, vCores:-2>
{code}
The related code is in method {{resourceDeficit()}}.
For new preemption code, the related code is in method
{{fairShareStarvation()}}.
The negative value isn't only a display issue, but also may missing necessary
preemption.
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