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  1. Hadoop YARN
  2. YARN-7469

Capacity Scheduler Intra-queue preemption: User can starve if newest app is exactly at user limit

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    • Hadoop Flags:
      Reviewed

      Description

      Queue Configuration:

      • Total Memory: 20GB
      • 2 Queues
        • Queue1
          • Memory: 10GB
          • MULP: 10%
          • ULF: 2.0
      • Minimum Container Size: 0.5GB

      Use Case:

      • User1 submits app1 to Queue1 and consumes 20GB
      • User2 submits app2 to Queue1 and requests 7.5GB
      • Preemption monitor preempts 7.5GB from app1. Capacity Scheduler gives those resources to User2
      • User 3 submits app3 to Queue1. To begin with, app3 is requesting 1 container for the AM.
      • Preemption monitor never preempts a container.

        Attachments

        1. UnitTestToShowStarvedUser.patch
          2 kB
          Eric Payne
        2. YARN-7469.001.patch
          5 kB
          Eric Payne

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            • Assignee:
              epayne Eric Payne
              Reporter:
              epayne Eric Payne

              Dates

              • Created:
                Updated:
                Resolved:

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