Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: Impala 3.1.0
    • Component/s: Distributed Exec
    • Labels:
      None
    • Epic Color:
      ghx-label-9

      Description

      We've recently been improving our query lifecycle by adding explicit state transitions so it's easier to reason about what should happen at a given stage in the lifetime of a query or a fragment instance.

      On the coordinator side. The coordinator's view of the query: https://github.com/apache/impala/commit/6ca87e46736a1e591ed7d7d5fee05b4b4d2fbb50

      On the fragment instance state side. A FIS's view of its own execution:
      https://github.com/apache/impala/blob/e12ee485cf4c77203b144c053ee167509cc39374/be/src/runtime/fragment-instance-state.h#L182-L203

      We don't have something like this for the QueryState class which maintains query wide state per executor. Adding it should make the lifecycle of a query from an executors point of view much easier to reason about.

      Additional info: This was identified as part of work for IMPALA-2990/IMPALA-4063, and is a precursor to it.

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              • Assignee:
                sailesh Sailesh Mukil
                Reporter:
                sailesh Sailesh Mukil
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