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  1. Core Server
  2. SERVER-56281

Investigate data race between curOp and FTDC in LockStats

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    Details

    • Type: Bug
    • Status: Investigating
    • Priority: Major - P3
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Operating System:
      ALL
    • Sprint:
      Execution Team 2021-05-17, Execution Team 2021-05-31, Execution Team 2021-07-12, Execution Team 2021-07-26, Execution Team 2021-08-09
    • Linked BF Score:
      25

      Description

      From linked ticket:

      [j1] WARNING: ThreadSanitizer: data race (pid=12709)

      [j1]   Write of size 8 at 0x7b6c0007fec8 by thread T12:
      [j1]     #0 mongo::CounterOps::add(long&, long) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_stats.h:62:17 (mongod+0x3914e64)
      [j1]     #1 mongo::LockStats<long>::recordAcquisition(mongo::ResourceId, mongo::LockMode) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_stats.h:128 (mongod+0x3914e64)
      [j1]     #2 mongo::LockerImpl::_lockBegin(mongo::OperationContext*, mongo::ResourceId, mongo::LockMode) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_state.cpp:855 (mongod+0x3914e64)
      [j1]     #3 mongo::LockerImpl::lock(mongo::OperationContext*, mongo::ResourceId, mongo::LockMode, mongo::Date_t) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_state.cpp:528:31 (mongod+0x391790b)
      [j1]     #4 mongo::Lock::GlobalLock::_takeGlobalAndRSTLLocks(mongo::LockMode, mongo::Date_t) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/d_concurrency.cpp:186:26 (mongod+0x390513f)
      [j1]     #5 mongo::Lock::GlobalLock::GlobalLock(mongo::OperationContext*, mongo::LockMode, mongo::Date_t, mongo::Lock::InterruptBehavior, bool) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/d_concurrency.cpp:167 (mongod+0x390513f)
      [j1]     #6 mongo::ephemeral_for_test::ServerStatusSection::generateSection(mongo::OperationContext*, mongo::BSONElement const&) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/storage/ephemeral_for_test/ephemeral_for_test_server_status.cpp:55:22 (mongod+0x12e9aa0)
      [j1]     #7 mongo::ServerStatusSection::appendSection(mongo::OperationContext*, mongo::BSONElement const&, mongo::BSONObjBuilder*) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands/server_status.h:100:26 (mongod+0x12cd83b)
      [j1]     #8 mongo::CmdServerStatus::run(mongo::OperationContext*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, mongo::BSONObj const&, mongo::BSONObjBuilder&) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands/server_status.cpp:127:22 (mongod+0x379f6b5)
      [j1]     #9 mongo::BasicCommand::runWithReplyBuilder(mongo::OperationContext*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, mongo::BSONObj const&, mongo::rpc::ReplyBuilderInterface*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands.h:939:16 (mongod+0x136751c)
      [j1]     #10 mongo::BasicCommandWithReplyBuilderInterface::Invocation::run(mongo::OperationContext*, mongo::rpc::ReplyBuilderInterface*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands.cpp:852:29 (mongod+0x37c069d)
      [j1]     #11 mongo::CommandHelpers::runCommandDirectly(mongo::OperationContext*, mongo::OpMsgRequest const&) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands.cpp:154:21 (mongod+0x37ac1a7)
      [j1]     #12 mongo::FTDCServerStatusCommandCollector::collect(mongo::OperationContext*, mongo::BSONObjBuilder&) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/ftdc/ftdc_server.cpp:241:23 (mongod+0x196db8b)
      [j1]     #13 mongo::FTDCCollectorCollection::collect(mongo::Client*) /data/mci/bff03bc3ef59ce3b0d49638acf862c0c/src/src/mongo/db/ftdc/collector.cpp:92:20 (mongod+0x19b69c9)
      [j1]     #14 mongo::FTDCController::doLoop() /data/mci/bff03bc3ef59ce3b0d49638acf862c0c/src/src/mongo/db/ftdc/controller.cpp:249:54 (mongod+0x19bbfb4)
      

      [j1]   Previous read of size 8 at 0x7b6c0007fec8 by thread T9 (mutexes: write M492435077276487480, write M889596492753405736, write M627824626973737032):
      [j1]     #0 void mongo::LockStatCounters<long>::append<long>(mongo::LockStatCounters<long> const&) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_stats.h:85:48 (mongod+0x391d261)
      [j1]     #1 void mongo::LockStats<long>::append<long>(mongo::LockStats<long> const&) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_stats.h:156 (mongod+0x391d261)
      [j1]     #2 mongo::LockerImpl::getLockerInfo(mongo::Locker::LockerInfo*, boost::optional<mongo::LockStats<long> >) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_state.cpp:710:23 (mongod+0x3918864)
      [j1]     #3 mongo::LockerImpl::getLockerInfo(boost::optional<mongo::LockStats<long> >) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/concurrency/lock_state.cpp:723:5 (mongod+0x3918967)
      [j1]     #4 mongo::CommonMongodProcessInterface::_reportCurrentOpForClient(mongo::OperationContext*, mongo::Client*, mongo::MongoProcessInterface::CurrentOpTruncateMode, mongo::MongoProcessInterface::CurrentOpBacktraceMode) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/process_interface/common_mongod_process_interface.cpp:479:57 (mongod+0x27fd07e)
      [j1]     #5 mongo::CommonProcessInterface::getCurrentOps(boost::intrusive_ptr<mongo::ExpressionContext> const&, mongo::MongoProcessInterface::CurrentOpConnectionsMode, mongo::MongoProcessInterface::CurrentOpSessionsMode, mongo::MongoProcessInterface::CurrentOpUserMode, mongo::MongoProcessInterface::CurrentOpTruncateMode, mongo::MongoProcessInterface::CurrentOpCursorMode, mongo::MongoProcessInterface::CurrentOpBacktraceMode) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/process_interface/common_process_interface.cpp:96:26 (mongod+0x2829baa)
      [j1]     #6 mongo::DocumentSourceCurrentOp::doGetNext() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/document_source_current_op.cpp:114:48 (mongod+0x35654ee)
      [j1]     #7 mongo::DocumentSource::getNext() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/document_source.h:266:20 (mongod+0x192b1e3)
      [j1]     #8 mongo::DocumentSourceGroup::initialize() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/document_source_group.cpp:546:36 (mongod+0x359f962)
      [j1]     #9 mongo::DocumentSourceGroup::doGetNext() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/document_source_group.cpp:173:43 (mongod+0x359f7b1)
      [j1]     #10 mongo::DocumentSource::getNext() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/document_source.h:266:20 (mongod+0x192b1e3)
      [j1]     #11 mongo::Pipeline::getNext() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/pipeline.cpp:448:40 (mongod+0x367ca60)
      [j1]     #12 mongo::PlanExecutorPipeline::_getNext() /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/plan_executor_pipeline.cpp:119:31 (mongod+0x2dad7ad)
      [j1]     #13 mongo::PlanExecutorPipeline::getNextDocument(mongo::Document*, mongo::RecordId*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/plan_executor_pipeline.cpp:101:21 (mongod+0x2dad2ba)
      [j1]     #14 mongo::PlanExecutorPipeline::getNext(mongo::BSONObj*, mongo::RecordId*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/pipeline/plan_executor_pipeline.cpp:81 (mongod+0x2dad2ba)
      [j1]     #15 mongo::(anonymous namespace)::handleCursorCommand(mongo::OperationContext*, boost::intrusive_ptr<mongo::ExpressionContext>, mongo::NamespaceString const&, std::vector<mongo::ClientCursor*, std::allocator<mongo::ClientCursor*> >, mongo::AggregateCommand const&, mongo::BSONObj const&, mongo::rpc::ReplyBuilderInterface*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands/run_aggregate.cpp:185:27 (mongod+0x266b222)
      [j1]     #16 mongo::runAggregate(mongo::OperationContext*, mongo::NamespaceString const&, mongo::AggregateCommand const&, mongo::LiteParsedPipeline const&, mongo::BSONObj const&, std::vector<mongo::Privilege, std::allocator<mongo::Privilege> > const&, mongo::rpc::ReplyBuilderInterface*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands/run_aggregate.cpp:883 (mongod+0x266b222)
      [j1]     #17 mongo::runAggregate(mongo::OperationContext*, mongo::NamespaceString const&, mongo::AggregateCommand const&, mongo::BSONObj const&, std::vector<mongo::Privilege, std::allocator<mongo::Privilege> > const&, mongo::rpc::ReplyBuilderInterface*) /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands/run_aggregate.cpp:543:12 (mongod+0x266624c)
      [j1]     #18 mongo::CurrentOpCommand::runAggregation(mongo::OperationContext*, mongo::AggregateCommand const&) const /data/mci/2c4620ccdb5f3dab379b45edc08d4983/src/src/mongo/db/commands/current_op.cpp:80:23 (mongod+0x25f8ac2)
      

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            Assignee:
            henrik.edin Henrik Edin
            Reporter:
            henrik.edin Henrik Edin
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              Created:
              Updated: