Sandy Ryza created YARN-657:
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Summary: Fair scheduler can consider apps starved when they are
alone on the cluster
Key: YARN-657
URL: https://issues.apache.org/jira/browse/YARN-657
Project: Hadoop YARN
Issue Type: Bug
Components: scheduler
Affects Versions: 2.0.4-alpha
Reporter: Sandy Ryza
Assignee: Sandy Ryza
If a lone app on a cluster requests a lot of resources and it takes some time
to allocate them, the fair scheduler may think the app is starved because it
has not reached its minimum share. This can cause confusing log messages and I
believe unnecessary preemptions in certain edge cases where another app is
running on the cluster but not using all the resources.
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