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threads","message":"MB-19897: Fix the data race on lastSendTime between stats and dcp worker threads\n\nFix the thread sanitizer warning\nhttp://cv.jenkins.couchbase.com/job/ep-engine-threadsanitizer-3.0.x/258/console\n\nWARNING: ThreadSanitizer: data race (pid\u003d102290)\n  Read of size 4 at 0x7d580000f71c by thread T14 (mutexes: write M969):\n    #0 void ConnHandler::addStat\u003cunsigned int\u003e(char const*, unsigned int const\u0026, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) const /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/tapconnection.h:294 (ep.so+0x00000020e9f3)\n    #1 DcpProducer::addStats(void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/dcp-producer.cc:557 (ep.so+0x00000027fbe5)\n    #2 ConnStatBuilder::operator()(SingleThreadedRCPtr\u003cConnHandler\u003e\u0026) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/ep_engine.cc:3701 (ep.so+0x000000183c44)\n    #3 ConnStatBuilder std::for_each\u003cstd::_List_iterator\u003cSingleThreadedRCPtr\u003cConnHandler\u003e \u003e, ConnStatBuilder\u003e(std::_List_iterator\u003cSingleThreadedRCPtr\u003cConnHandler\u003e \u003e, std::_List_iterator\u003cSingleThreadedRCPtr\u003cConnHandler\u003e \u003e, ConnStatBuilder) /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/bits/stl_algo.h:3755 (ep.so+0x0000001838a5)\n    #4 void ConnMap::each_UNLOCKED\u003cConnStatBuilder\u003e(ConnStatBuilder) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/connmap.h:148 (ep.so+0x000000183808)\n    #5 void ConnMap::each\u003cConnStatBuilder\u003e(ConnStatBuilder) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/connmap.h:140 (ep.so+0x00000017732e)\n    #6 EventuallyPersistentEngine::doDcpStats(void const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/ep_engine.cc:3954 (ep.so+0x00000014c5ed)\n\n  Previous write of size 4 at 0x7d580000f71c by main thread:\n    #0 DcpProducer::maybeSendNoop(dcp_message_producers*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/dcp-producer.cc:740 (ep.so+0x00000027d8ce)\n    #1 DcpProducer::step(dcp_message_producers*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/dcp-producer.cc:323 (ep.so+0x00000027c920)\n    #2 EvpDcpStep(engine_interface*, void const*, dcp_message_producers*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/ep_engine.cc:1404 (ep.so+0x000000138baa)\n\nChange-Id: I2a2b0b0f01b10ecb31701bfc2330881bbafc6b74\n"},"parents_data":[{"branch_name":"refs/heads/sherlock","commit_id":"4da103409e0672dd0da97076e1eb127e082ee747","is_merged_in_target_branch":false,"change_id":"I23b112c16b9167023a990a5709ae6aae4838472e","change_number":64906,"patch_set_number":3,"change_status":"MERGED"}],"branch":"refs/heads/sherlock"},"7b11a7f3c1ec2e4dc3d0e3c1e719f5621fa206a6":{"kind":"REWORK","_number":2,"created":"2016-06-16 20:14:50.000000000","uploader":{"_account_id":1000966,"name":"Dave 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race on lastSendTime between stats and dcp worker threads\n\nFix the thread sanitizer warning\nhttp://cv.jenkins.couchbase.com/job/ep-engine-threadsanitizer-3.0.x/258/console\n\nWARNING: ThreadSanitizer: data race (pid\u003d102290)\n  Read of size 4 at 0x7d580000f71c by thread T14 (mutexes: write M969):\n    #0 void ConnHandler::addStat\u003cunsigned int\u003e(char const*, unsigned int const\u0026, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) const /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/tapconnection.h:294 (ep.so+0x00000020e9f3)\n    #1 DcpProducer::addStats(void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/dcp-producer.cc:557 (ep.so+0x00000027fbe5)\n    #2 ConnStatBuilder::operator()(SingleThreadedRCPtr\u003cConnHandler\u003e\u0026) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/ep_engine.cc:3701 (ep.so+0x000000183c44)\n    #3 ConnStatBuilder std::for_each\u003cstd::_List_iterator\u003cSingleThreadedRCPtr\u003cConnHandler\u003e \u003e, ConnStatBuilder\u003e(std::_List_iterator\u003cSingleThreadedRCPtr\u003cConnHandler\u003e \u003e, std::_List_iterator\u003cSingleThreadedRCPtr\u003cConnHandler\u003e \u003e, ConnStatBuilder) /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/bits/stl_algo.h:3755 (ep.so+0x0000001838a5)\n    #4 void ConnMap::each_UNLOCKED\u003cConnStatBuilder\u003e(ConnStatBuilder) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/connmap.h:148 (ep.so+0x000000183808)\n    #5 void ConnMap::each\u003cConnStatBuilder\u003e(ConnStatBuilder) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/connmap.h:140 (ep.so+0x00000017732e)\n    #6 EventuallyPersistentEngine::doDcpStats(void const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/ep_engine.cc:3954 (ep.so+0x00000014c5ed)\n\n  Previous write of size 4 at 0x7d580000f71c by main thread:\n    #0 DcpProducer::maybeSendNoop(dcp_message_producers*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/dcp-producer.cc:740 (ep.so+0x00000027d8ce)\n    #1 DcpProducer::step(dcp_message_producers*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/dcp-producer.cc:323 (ep.so+0x00000027c920)\n    #2 EvpDcpStep(engine_interface*, void const*, dcp_message_producers*) /home/couchbase/jenkins/workspace/ep-engine-threadsanitizer-3.0.x/ep-engine/src/ep_engine.cc:1404 (ep.so+0x000000138baa)\n\nChange-Id: I2a2b0b0f01b10ecb31701bfc2330881bbafc6b74\nReviewed-on: http://review.couchbase.org/64959\nWell-Formed: buildbot \u003cbuild@couchbase.com\u003e\nTested-by: buildbot \u003cbuild@couchbase.com\u003e\nReviewed-by: Dave Rigby \u003cdaver@couchbase.com\u003e\n"},"parents_data":[{"branch_name":"refs/heads/sherlock","commit_id":"7d3c7f72cef69caeb1a70a99c3eb20d40bdf180b","is_merged_in_target_branch":true,"change_id":"I2e7cd72f09c8b2b3780568ed7f7ca81fde064cb9","change_number":64955,"patch_set_number":1,"change_status":"MERGED"}],"branch":"refs/heads/sherlock"}},"requirements":[],"submit_records":[],"submit_requirements":[]}