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  1. IMPALA
  2. IMPALA-2990

Coordinator should timeout and cancel queries with unresponsive / stuck executors

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      The coordinator currently waits indefinitely if it does not hear back from a backend. This could cause a query to hang indefinitely in case of a network error, etc.

      We should add logic for determining when a backend is unresponsive and kill the query. The logic should mostly revolve around Coordinator::Wait() and Coordinator::UpdateFragmentExecStatus() based on whether it receives periodic updates from a backed (via FragmentExecState::ReportStatusCb()).

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              twmarshall Thomas Tauber-Marshall
              sailesh Sailesh Mukil
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