Maxim Khutornenko created AURORA-1431:
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Summary: Slave reservation is too restrictive
Key: AURORA-1431
URL: https://issues.apache.org/jira/browse/AURORA-1431
Project: Aurora
Issue Type: Bug
Components: Scheduler
Reporter: Maxim Khutornenko
Assignee: Maxim Khutornenko
Priority: Blocker
This is a regression introduced in https://reviews.apache.org/r/37001/. The
updated TaskAssigner logic looks for an exclusive task->slave match any time a
slave reservation is present. Any time scheduling fails and a slave reservation
is created by the preemptor a task group gets effectively locked into the
reserved slave. Given that reverse slave->task relationship is no longer
enforced, a reserved slave could be taken by some other task thus slowing down
scheduling progress.
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