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  1. Hadoop YARN
  2. YARN-6042

Dump scheduler and queue state information into FairScheduler DEBUG log


    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.9.0, 3.0.0-alpha4
    • Component/s: fairscheduler
    • Labels:
    • Hadoop Flags:


      To improve the debugging of scheduler issues it would be a big improvement to be able to dump the scheduler state into a log on request.
      The Dump the scheduler state at a point in time would allow debugging of a scheduler that is not hung (deadlocked) but also not assigning containers. Currently we do not have a proper overview of what state the scheduler and the queues are in and we have to make assumptions or guess
      The scheduler and queue state needed would include (not exhaustive):

      • instantaneous and steady fair share (app / queue)
      • AM share and resources
      • weight
      • app demand
      • application run state (runnable/non runnable)
      • last time at fair/min share


        1. YARN-6042.001.patch
          11 kB
          Yufei Gu
        2. YARN-6042.002.patch
          12 kB
          Yufei Gu
        3. YARN-6042.003.patch
          16 kB
          Yufei Gu
        4. YARN-6042.004.patch
          16 kB
          Yufei Gu
        5. YARN-6042.005.patch
          16 kB
          Yufei Gu
        6. YARN-6042.006.patch
          16 kB
          Yufei Gu
        7. YARN-6042.007.patch
          16 kB
          Yufei Gu
        8. YARN-6042.008.patch
          18 kB
          Yufei Gu
        9. YARN-6042.009.patch
          18 kB
          Yufei Gu
        10. YARN-6042.010.patch
          18 kB
          Yufei Gu
        11. YARN-6042.branch-2.001.patch
          18 kB
          Yufei Gu

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              • Assignee:
                yufeigu Yufei Gu
                yufeigu Yufei Gu
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