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  1. Hadoop YARN
  2. YARN-6210

FS: Node reservations can interfere with preemption

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.9.0
    • 2.9.0, 3.0.0-alpha4
    • fairscheduler
    • None
    • Reviewed

    Description

      Today, on a saturated cluster, apps with pending demand reserve nodes. A new app might not be able to preempt resources because these nodes are already reserved. This can be reproduced by the example in YARN-6151.

      Since node reservations are to prevent starvation of apps requesting large containers, triggering these reservations only on starved applications would avoid this situation.

      Attachments

        1. YARN-6210.4.patch
          27 kB
          Karthik Kambatla
        2. YARN-6210.3.patch
          27 kB
          Karthik Kambatla
        3. YARN-6210.2.patch
          26 kB
          Karthik Kambatla
        4. YARN-6210.1.patch
          16 kB
          Karthik Kambatla

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            kasha Karthik Kambatla
            kasha Karthik Kambatla
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              Updated:
              Resolved:

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