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From "Alex Behm (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-5199: prevent hang on empty row batch exchange
Date Fri, 08 Sep 2017 16:00:45 GMT
Alex Behm has posted comments on this change.

Change subject: IMPALA-5199: prevent hang on empty row batch exchange
......................................................................


Patch Set 2:

If we hit IMPALA-5199 without this patch, can system be brought back into a good state by
cancelling the query?

I think it's generally preferable to avoid hangs even if it means we unnecessarily (gracefully)
have cancel some queries under load. Whether the latter case is rare is really the key question
here. Is there an experiment we can do to get data to make a decision?

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Gerrit-MessageType: comment
Gerrit-Change-Id: Ib370ebe44e3bb34d3f0fb9f05aa6386eb91c8645
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.behm@cloudera.com>
Gerrit-Reviewer: Sailesh Mukil <sailesh@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-HasComments: No

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