Impala Public Jenkins has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/16437 )

Change subject: IMPALA-10154: Fix data race on coord_backend_id in TSAN build
......................................................................

IMPALA-10154: Fix data race on coord_backend_id in TSAN build

This issue was introduced by the patch for IMPALA-5746.
QueryState::exec_rpc_params_.coord_backend_id is set in function
QuestState::Init(), but it could be accessed by QueryExecMgr object in
QueryExecMgr::CancelQueriesForFailedCoordinators() before or during
QueryState::Init() is called, hence cause data race.
To fix it, move coord_backend_id from class ExecQueryFInstancesRequestPB
to class TQueryCtx. QueryState::query_ctx_ is a constant variable and is
set in QueryState c'tor so that QueryState::query_ctx_.coord_backend_id
is valid and will not be changed once the QuestState object is created.

Testing:
 - Passed tests/custom_cluster/test_process_failures.py.
 - Passed the core tests for normal build.
 - Passed the core tests against a TSAN build.

Change-Id: I1c4b51e741a28b80bf3485adff8c97aabe0a3f67
Reviewed-on: http://gerrit.cloudera.org:8080/16437
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
---
M be/src/runtime/coordinator-backend-state.cc
M be/src/runtime/query-exec-mgr.cc
M be/src/runtime/query-state.cc
M be/src/runtime/query-state.h
M be/src/runtime/test-env.cc
M be/src/service/impala-server.cc
M common/protobuf/control_service.proto
M common/thrift/ImpalaInternalService.thrift
8 files changed, 16 insertions(+), 11 deletions(-)

Approvals:
  Impala Public Jenkins: Looks good to me, approved; Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I1c4b51e741a28b80bf3485adff8c97aabe0a3f67
Gerrit-Change-Number: 16437
Gerrit-PatchSet: 4
Gerrit-Owner: Wenzhe Zhou <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Sahil Takiar <[email protected]>
Gerrit-Reviewer: Thomas Tauber-Marshall <[email protected]>

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