Hello Csaba Ringhofer, Wenzhe Zhou, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/19816
to look at the new patch set (#2).
Change subject: IMPALA-12106: Fix overparallelization of Union fragment by 1
......................................................................
IMPALA-12106: Fix overparallelization of Union fragment by 1
IMPALA-10973 has a bug where a union fragment without a scan node can be
over-parallelized by the backend scheduler by 1. It is reproducible by
running TPC-DS Q11 with MT_DOP=1. This patch additionally checks that
such a fragment does not have an input fragment before randomizing the
host assignment.
Testing:
Add TPC-DS Q11 to test_mt_dop.py::TestMtDopScheduling::test_scheduling
and verify the number of fragment instances scheduled in the
ExecSummary.
Change-Id: Ic69e7c8c0cadb4b07ee398aff362fbc6513eb08d
---
M be/src/scheduling/scheduler.cc
M
testdata/workloads/functional-query/queries/QueryTest/mt-dop-parquet-scheduling.test
2 files changed, 179 insertions(+), 2 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/16/19816/2
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ic69e7c8c0cadb4b07ee398aff362fbc6513eb08d
Gerrit-Change-Number: 19816
Gerrit-PatchSet: 2
Gerrit-Owner: Riza Suminto <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Reviewer: Wenzhe Zhou <[email protected]>
