Riza Suminto has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/22300


Change subject: IMPALA-13643: Add scan_multithread_constraint in 
test_scanners.py
......................................................................

IMPALA-13643: Add scan_multithread_constraint in test_scanners.py

Debug action HDFS_SCANNER_THREAD_CHECK_SOFT_MEM_LIMIT exist inside
HdfsScanNode (hdfs-scan-node.cc) code path. MT_DOP > 0 executes using
HdfsScanNodeMt (hdfs-scan-node-mt.cc) rather than HdfsScanNode, and
always start single scanner thread per ScanNode. Thus, there is no need
to exercise HDFS_SCANNER_THREAD_CHECK_SOFT_MEM_LIMIT and MT_DOP > 0
combination.

This patch adds scan_multithread_constraint in test_scanners.py where
'mt_dop' exec option dimension is declared. This reduce core test vector
combination from 1254 to 1138 and exhaustive test vector combination
from 7530 to 6774.

Testing:
- Run and pass test_scanners.py in core exploration.

Change-Id: I77c2e6f9bbd4bc1825fa1f006a22ee1a6ea5a606
---
M tests/query_test/test_scanners.py
1 file changed, 17 insertions(+), 1 deletion(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/00/22300/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I77c2e6f9bbd4bc1825fa1f006a22ee1a6ea5a606
Gerrit-Change-Number: 22300
Gerrit-PatchSet: 1
Gerrit-Owner: Riza Suminto <[email protected]>

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