Hello David Ribeiro Alves, Todd Lipcon,

I'd like you to do a code review.  Please visit

    http://gerrit.cloudera.org:8080/6958

to review the following change.

Change subject: KUDU-871 (part 2). Make ConsensusMetadata thread-safe
......................................................................

KUDU-871 (part 2). Make ConsensusMetadata thread-safe

This patch simply adds locks around all accessors and makes
ConsensusMetadata refcounted. This enabled ConsensusMetadata to be a
long-lived shared object that brokers access to the underlying
ConsensusMetadata file in a followup patch.

TODO: Could use an MT test in consensus_meta-test to exercise the lock.

Change-Id: Id2c70605c0593e55486184705ea448dcb4bef2d7
---
M src/kudu/consensus/consensus_meta-test.cc
M src/kudu/consensus/consensus_meta.cc
M src/kudu/consensus/consensus_meta.h
M src/kudu/consensus/raft_consensus.cc
M src/kudu/consensus/raft_consensus.h
M src/kudu/consensus/raft_consensus_quorum-test.cc
M src/kudu/consensus/raft_consensus_state.cc
M src/kudu/consensus/raft_consensus_state.h
M src/kudu/integration-tests/ts_recovery-itest.cc
M src/kudu/master/sys_catalog.cc
M src/kudu/master/sys_catalog.h
M src/kudu/tablet/tablet_bootstrap-test.cc
M src/kudu/tablet/tablet_bootstrap.cc
M src/kudu/tablet/tablet_replica-test.cc
M src/kudu/tablet/tablet_replica.cc
M src/kudu/tablet/tablet_replica.h
M src/kudu/tools/tool_action_local_replica.cc
M src/kudu/tserver/tablet_copy_client.cc
M src/kudu/tserver/tablet_copy_client.h
M src/kudu/tserver/tablet_copy_source_session-test.cc
M src/kudu/tserver/ts_tablet_manager.cc
M src/kudu/tserver/ts_tablet_manager.h
22 files changed, 195 insertions(+), 98 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/58/6958/1
-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Id2c70605c0593e55486184705ea448dcb4bef2d7
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: David Ribeiro Alves <davidral...@gmail.com>
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>

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