TSAN race in ListTablets vs tablet metadata loading

WARNING: ThreadSanitizer: data race (pid=20066)
  Write of size 8 at 0x7d4c0000cd90 by thread T71 (mutexes: write M4355):
    #0 std::vector<kudu::PartitionSchema::HashBucketSchema, std::allocator<kudu::PartitionSchema::HashBucketSchema> >::_M_erase_at_end(kudu::PartitionSchema::HashBucketSchema*) /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/bits/stl_vector.h:1439:26 (libkudu_common.so+0x000000158983)
    #1 std::vector<kudu::PartitionSchema::HashBucketSchema, std::allocator<kudu::PartitionSchema::HashBucketSchema> >::clear() /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/bits/stl_vector.h:1212:9 (libkudu_common.so+0x00000013d721)
    #2 kudu::PartitionSchema::Clear() /data/1/todd/kudu/build/tsan/../../src/kudu/common/partition.cc:876:3 (libkudu_common.so+0x00000012f8fc)
    #3 kudu::PartitionSchema::FromPB(kudu::PartitionSchemaPB const&, kudu::Schema const&, kudu::PartitionSchema*) /data/1/todd/kudu/build/tsan/../../src/kudu/common/partition.cc:129:3 (libkudu_common.so+0x00000012f4e6)
    #4 kudu::tablet::TabletMetadata::LoadFromSuperBlock(kudu::tablet::TabletSuperBlockPB const&) /data/1/todd/kudu/build/tsan/../../src/kudu/tablet/tablet_metadata.cc:298:7 (libtablet.so+0x0000003a4561)
    #5 kudu::tablet::TabletMetadata::ReplaceSuperBlock(kudu::tablet::TabletSuperBlockPB const&) /data/1/todd/kudu/build/tsan/../../src/kudu/tablet/tablet_metadata.cc:494:3 (libtablet.so+0x0000003a7805)
    #6 kudu::tserver::RemoteBootstrapClient::Start(std::string const&, kudu::HostPort const&, scoped_refptr<kudu::tablet::TabletMetadata>*) /data/1/todd/kudu/build/tsan/../../src/kudu/tserver/remote_bootstrap_client.cc:222:5 (libtserver.so+0x0000001148ca)
    #7 kudu::tserver::TSTabletManager::StartRemoteBootstrap(kudu::consensus::StartRemoteBootstrapRequestPB const&, boost::optional<kudu::tserver::TabletServerErrorPB_Code>*) /data/1/todd/kudu/build/tsan/../../src/kudu/tserver/ts_tablet_manager.cc:423:3 (libtserver.so+0x0000001aa273)
    #8 kudu::tserver::ConsensusServiceImpl::StartRemoteBootstrap(kudu::consensus::StartRemoteBootstrapRequestPB const*, kudu::consensus::StartRemoteBootstrapResponsePB*, kudu::rpc::RpcContext*) /data/1/todd/kudu/build/tsan/../../src/kudu/tserver/tablet_service.cc:982:14 (libtserver.so+0x000000175d03)
    #9 kudu::consensus::ConsensusServiceIf::ConsensusServiceIf(scoped_refptr<kudu::MetricEntity> const&)::$_8::operator()(google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*) const /data/1/todd/kudu/build/tsan/src/kudu/consensus/consensus.service.cc:188:7 (libconsensus_proto.so+0x00000009e457)
    #10 std::_Function_handler<void (google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*), kudu::consensus::ConsensusServiceIf::ConsensusServiceIf(scoped_refptr<kudu::MetricEntity> const&)::$_8>::_M_invoke(std::_Any_data const&, google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*) /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/functional:2039:2 (libconsensus_proto.so+0x00000009e17a)
    #11 std::function<void (google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*)>::operator()(google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*) const /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/functional:2439:14 (libkrpc.so+0x000000177997)
    #12 kudu::rpc::GeneratedServiceIf::Handle(kudu::rpc::InboundCall*) /data/1/todd/kudu/build/tsan/../../src/kudu/rpc/service_if.cc:94:3 (libkrpc.so+0x00000017744c)
    #13 kudu::rpc::ServicePool::RunThread() /data/1/todd/kudu/build/tsan/../../src/kudu/rpc/service_pool.cc:206:5 (libkrpc.so+0x00000017a650)
    #14 boost::_mfi::mf0<void, kudu::rpc::ServicePool>::operator()(kudu::rpc::ServicePool*) const /usr/include/boost/bind/mem_fn_template.hpp:49:29 (libkrpc.so+0x00000017d55b)
    #15 void boost::_bi::list1<boost::_bi::value<kudu::rpc::ServicePool*> >::operator()<boost::_mfi::mf0<void, kudu::rpc::ServicePool>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, kudu::rpc::ServicePool>&, boost::_bi::list0&, int) /usr/include/boost/bind/bind.hpp:246:9 (libkrpc.so+0x00000017d438)
    #16 boost::_bi::bind_t<void, boost::_mfi::mf0<void, kudu::rpc::ServicePool>, boost::_bi::list1<boost::_bi::value<kudu::rpc::ServicePool*> > >::operator()() /usr/include/boost/bind/bind_template.hpp:20:27 (libkrpc.so+0x00000017d39a)
    #17 boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, kudu::rpc::ServicePool>, boost::_bi::list1<boost::_bi::value<kudu::rpc::ServicePool*> > >, void>::invoke(boost::detail::function::function_buffer&) /usr/include/boost/function/function_template.hpp:153:11 (libkrpc.so+0x00000017d050)
    #18 boost::function0<void>::operator()() const /usr/include/boost/function/function_template.hpp:1012:12 (libkrpc.so+0x0000000de7ca)
    #19 kudu::Thread::SuperviseThread(void*) /data/1/todd/kudu/build/tsan/../../src/kudu/util/thread.cc:586:3 (libkudu_util.so+0x0000002c1549)

  Previous read of size 8 at 0x7d4c0000cd90 by thread T31:
    #0 std::vector<kudu::PartitionSchema::HashBucketSchema, std::allocator<kudu::PartitionSchema::HashBucketSchema> >::size() const /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/bits/stl_vector.h:655:40 (libtserver.so+0x00000010d296)
    #1 kudu::PartitionSchema::ToPB(kudu::PartitionSchemaPB*) const /data/1/todd/kudu/build/tsan/../../src/kudu/common/partition.cc:164:46 (libkudu_common.so+0x00000013050c)
    #2 kudu::tserver::TabletServiceImpl::ListTablets(kudu::tserver::ListTabletsRequestPB const*, kudu::tserver::ListTabletsResponsePB*, kudu::rpc::RpcContext*) /data/1/todd/kudu/build/tsan/../../src/kudu/tserver/tablet_service.cc:1110:5 (libtserver.so+0x00000017e82f)
    #3 kudu::tserver::TabletServerServiceIf::TabletServerServiceIf(scoped_refptr<kudu::MetricEntity> const&)::$_4::operator()(google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*) const /data/1/todd/kudu/build/tsan/src/kudu/tserver/tserver_service.service.cc:118:7 (libtserver_service_proto.so+0x000000027997)
    #4 std::_Function_handler<void (google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*), kudu::tserver::TabletServerServiceIf::TabletServerServiceIf(scoped_refptr<kudu::MetricEntity> const&)::$_4>::_M_invoke(std::_Any_data const&, google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*) /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/functional:2039:2 (libtserver_service_proto.so+0x0000000276ba)
    #5 std::function<void (google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*)>::operator()(google::protobuf::Message const*, google::protobuf::Message*, kudu::rpc::RpcContext*) const /data/1/todd/kudu/thirdparty/installed-deps-tsan/gcc/include/c++/4.9.3/functional:2439:14 (libkrpc.so+0x000000177997)
    #6 kudu::rpc::GeneratedServiceIf::Handle(kudu::rpc::InboundCall*) /data/1/todd/kudu/build/tsan/../../src/kudu/rpc/service_if.cc:94:3 (libkrpc.so+0x00000017744c)
    #7 kudu::rpc::ServicePool::RunThread() /data/1/todd/kudu/build/tsan/../../src/kudu/rpc/service_pool.cc:206:5 (libkrpc.so+0x00000017a650)
    #8 boost::_mfi::mf0<void, kudu::rpc::ServicePool>::operator()(kudu::rpc::ServicePool*) const /usr/include/boost/bind/mem_fn_template.hpp:49:29 (libkrpc.so+0x00000017d55b)
    #9 void boost::_bi::list1<boost::_bi::value<kudu::rpc::ServicePool*> >::operator()<boost::_mfi::mf0<void, kudu::rpc::ServicePool>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, kudu::rpc::ServicePool>&, boost::_bi::list0&, int) /usr/include/boost/bind/bind.hpp:246:9 (libkrpc.so+0x00000017d438)
    #10 boost::_bi::bind_t<void, boost::_mfi::mf0<void, kudu::rpc::ServicePool>, boost::_bi::list1<boost::_bi::value<kudu::rpc::ServicePool*> > >::operator()() /usr/include/boost/bind/bind_template.hpp:20:27 (libkrpc.so+0x00000017d39a)
    #11 boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, kudu::rpc::ServicePool>, boost::_bi::list1<boost::_bi::value<kudu::rpc::ServicePool*> > >, void>::invoke(boost::detail::function::function_buffer&) /usr/include/boost/function/function_template.hpp:153:11 (libkrpc.so+0x00000017d050)
    #12 boost::function0<void>::operator()() const /usr/include/boost/function/function_template.hpp:1012:12 (libkrpc.so+0x0000000de7ca)
    #13 kudu::Thread::SuperviseThread(void*) /data/1/todd/kudu/build/tsan/../../src/kudu/util/thread.cc:586:3 (libkudu_util.so+0x0000002c1549)