Andrew Wong has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/17361 )

Change subject: KUDU-2612: fix race when adopting partition lock
......................................................................

KUDU-2612: fix race when adopting partition lock

The way we were transferring the partition lock to the Txn wasn't
thread-safe. This patch wraps the critical section with a spinlock.

This patch includes a test that would trigger a TSAN error.

Change-Id: Ifc7ac7f474baf308860847298355b300c76d9ef5
Reviewed-on: http://gerrit.cloudera.org:8080/17361
Reviewed-by: Alexey Serbin <[email protected]>
Tested-by: Andrew Wong <[email protected]>
---
M src/kudu/tablet/txn_participant-test.cc
M src/kudu/tablet/txn_participant.cc
M src/kudu/tablet/txn_participant.h
3 files changed, 23 insertions(+), 0 deletions(-)

Approvals:
  Alexey Serbin: Looks good to me, approved
  Andrew Wong: Verified

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Ifc7ac7f474baf308860847298355b300c76d9ef5
Gerrit-Change-Number: 17361
Gerrit-PatchSet: 3
Gerrit-Owner: Andrew Wong <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)

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