Details

    • Type: Sub-task
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: Impala 2.9.0
    • Fix Version/s: None
    • Component/s: Distributed Exec
    • Labels:
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      Description

      If it reports a bad status, UpdateFragmentExecStatus() will call UpdateStatus(), which takes Coordinator::lock_ and then calls Cancel(). That method issues one RPC per fragment instance.

      In KRPC, doing so much work from UpdateFragmentExecStatus() - which is an RPC handler - is a bad idea, even if the RPCs are issued asynchronously. There's still some serialization cost.

      It's also a bad idea to do all this work while holding lock_. We should address both of these to ensure scalability of the cancellation path.

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              • Assignee:
                Unassigned
                Reporter:
                henryr Henry Robinson
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                • Created:
                  Updated: