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  1. Apache Nemo
  2. NEMO-64

Fix map stage hang under DataSkewPolicy

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.1

      Description

      Hundreds of GB scale MapReduce application running with DataSkewPolicy suffers occasional map stage hang - one map stage TaskGroup doesn't gets finished forever.

      It seems that there might be a race condition in the process of handling map stage TaskGroup state from ON_HOLD to COMPLETE, but we need to find the root cause of it.

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              • Assignee:
                jeongyoon Jeongyoon Eo
                Reporter:
                jeongyoon Jeongyoon Eo
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                • Created:
                  Updated:
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