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  1. IMPALA
  2. IMPALA-10599

The coordinator should avoid distributing query fragments to busy nodes.

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: Impala 3.2.0, Impala 3.4.0
    • Fix Version/s: None
    • Component/s: Distributed Exec
    • Labels:
    • Environment:
      LSB Version: core-4.1-amd64
      Distributor ID: CentOS
      Description: CentOS release 7.4.1708.7
      Release: 7.4.1708.7
      impala version: 3.2.0
    • Flags:
      Important
    • Epic Color:
      ghx-label-4

      Description

      When I join[shuffle] with unbalanced fields, there will be data-skewed nodes during execution.This will result in the skewed node being under high load for a long time, because the query is likely to be endless.If other queries are committed or running during this time, they may be rejected or an exception thrown.

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              • Assignee:
                Unassigned
                Reporter:
                tangzhi zhi tang
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                Dates

                • Created:
                  Updated: