Andrew Wong has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/17073 )

Change subject: KUDU-2612: make BeginCommit return OK if already committed
......................................................................

KUDU-2612: make BeginCommit return OK if already committed

This patch makes repeat calls to BeginCommit by the TxnStatusManager
return OK rather than an IllegalState error. This has previously
surfaced in flakiness in some tests, wherein repeated calls to
TxnManager::Commit() yields an IllegalState error since the commit has
already completed.

This also reverts 67018be8ba27480b050c11504df8a732f6a52daf that
addressed this by increasing commit latency.

Change-Id: I420ba1c5460d59103984ea9a1f16177b82b8d0e1
Reviewed-on: http://gerrit.cloudera.org:8080/17073
Reviewed-by: Alexey Serbin <[email protected]>
Tested-by: Andrew Wong <[email protected]>
---
M src/kudu/integration-tests/txn_commit-itest.cc
M src/kudu/transactions/txn_status_manager-test.cc
M src/kudu/transactions/txn_status_manager.cc
3 files changed, 4 insertions(+), 8 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: I420ba1c5460d59103984ea9a1f16177b82b8d0e1
Gerrit-Change-Number: 17073
Gerrit-PatchSet: 3
Gerrit-Owner: Andrew Wong <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Reviewer: Hao Hao <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)

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