Wenzhe Zhou has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/16313


Change subject: IMPALA-10039 (part 2): Fixed Expr-test crash due to race 
condition
......................................................................

IMPALA-10039 (part 2): Fixed Expr-test crash due to race condition

The root cause for crash is that QueryState::Cancel() was called
before thread unsafe function QueryState::Init() was completed.
This patch fixs the race condition between QueryState::Cancel()
and QueryState::Init().

Testing:
 - The issue could be reproduced by running expr-test for 10-20
   iterations. Verified the fixing by running expr-test over 1000
   iterations without crash.
 - Passed TestProcessFailures::test_kill_coordinator.
 - Passed core tests.

Change-Id: Ib0d3b9c59924a25b70fa20afeb6e8ca93016eca9
---
M be/src/runtime/query-state.cc
M be/src/runtime/query-state.h
2 files changed, 40 insertions(+), 6 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/13/16313/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ib0d3b9c59924a25b70fa20afeb6e8ca93016eca9
Gerrit-Change-Number: 16313
Gerrit-PatchSet: 1
Gerrit-Owner: Wenzhe Zhou <[email protected]>

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