Djellel Eddine Difallah created YARN-897:
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Summary: CapacityScheduler wrongly sorted queues
Key: YARN-897
URL: https://issues.apache.org/jira/browse/YARN-897
Project: Hadoop YARN
Issue Type: Bug
Components: capacityscheduler
Reporter: Djellel Eddine Difallah
The childQueues of a ParentQueue are stored in a TreeSet where UsedCapacity
defines the sort order. This ensures the queue with least UsedCapacity to
receive resources next. On containerAssignment we correctly update the order,
but we miss to do so on container completions. This corrupts the TreeSet
structure, and under-capacity queues might starve for resources.
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