Csaba Ringhofer created IMPALA-12968:
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Summary: Early EndDataStream RPC could be responded earlier
Key: IMPALA-12968
URL: https://issues.apache.org/jira/browse/IMPALA-12968
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: Csaba Ringhofer
When a producer fragment sends no rows and finishes before the receiver is
initialized te e EndDataStream rpc is stored as early sender and is responded
when the receiver is registered.
[https://github.com/apache/impala/blob/effc9df933b46eb5b0acf55a858606415425505f/be/src/runtime/krpc-data-stream-mgr.cc#L150]
While it is important to store the information that the EOS has happened to
unregister the sender from the receiver, the RPC itself could be responded
right after it was stored in the early sender map.
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