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  1. Hadoop YARN
  2. YARN-9580

Fulfilled reservation information in assignment is lost when transferring in ParentQueue#assignContainers

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.3.0, 3.2.1
    • Component/s: capacityscheduler
    • Labels:
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    • Hadoop Flags:
      Reviewed

      Description

      When transferring assignment from child queue to parent queue, fulfilled reservation information including fulfilledReservation and fulfilledReservedContainer in assignment is lost.

      When multi-nodes enabled, this lost can raise a problem that allocation proposal is generated but can't be accepted because there is a check for fulfilled reservation information in FiCaSchedulerApp#commonCheckContainerAllocation, this endless loop will always be there and the resource of the node can't be used anymore.

      In HB-driven scheduling mode, fulfilled reservation can be allocated via another calling stack: CapacityScheduler#allocateContainersToNode --> CapacityScheduler#allocateContainerOnSingleNode --> CapacityScheduler#allocateFromReservedContainer, in this way assignment can be generated by leaf queue and directly submitted, I think that's why we hardly find this problem before.

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