Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-18372

QuerySolution leak when exception is thrown during PlanStage building

XMLWordPrintableJSON

    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 3.1.2
    • Component/s: Querying
    • Labels:
    • Fully Compatible
    • ALL
    • Hide

      JS test to trigger the leak:

      var coll = db.fts;
coll.drop();

coll.ensureIndex({a: 'text'});
coll.find({$text: {$search: new Array(1024 * 16 + 2).join('a'), $language: 'zht'}}).itcount();
      Show
      JS test to trigger the leak: var coll = db.fts; coll.drop(); coll.ensureIndex({a: 'text'}); coll.find({$text: {$search: new Array(1024 * 16 + 2).join('a'), $language: 'zht'}}).itcount();
    • TIG E (01/08/16), TIG F (01/29/16), TIG 2016-10-10

      Triggering the RLP-token-length-limit error from SERVER-18266 leads to a leak during query execution:

      Server command:
      valgrind --show-leak-kinds=definite --leak-check=full --suppressions=./etc/valgrind.suppressions ./mongod --basisTechRootDirectory=/opt/basis/

      Leak report:

      ==19816== Thread 1:
==19816== 37,235 (40 direct, 37,195 indirect) bytes in 1 blocks are definitely lost in loss record 5,512 of 5,525
==19816==    at 0x4C2B0E0: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==19816==    by 0x173FD58: mongo::QueryPlannerAnalysis::analyzeDataAccess(mongo::CanonicalQuery const&, mongo::QueryPlannerParams const&, mongo::QuerySolutionNode*) (planner_analysis.cpp:531)
==19816==    by 0x174B468: mongo::QueryPlanner::plan(mongo::CanonicalQuery const&, mongo::QueryPlannerParams const&, std::vector<mongo::QuerySolution*, std::allocator<mongo::QuerySolution*> >*) (query_planner.cpp:772)
==19816==    by 0x16F1163: mongo::(anonymous namespace)::prepareExecution(mongo::OperationContext*, mongo::Collection*, mongo::WorkingSet*, mongo::CanonicalQuery*, unsigned long, mongo::PlanStage**, mongo::QuerySolution**) (get_executor.cpp:364)
==19816==    by 0x16F1F22: mongo::getExecutor(mongo::OperationContext*, mongo::Collection*, mongo::CanonicalQuery*, mongo::PlanExecutor::YieldPolicy, mongo::PlanExecutor**, unsigned long) (get_executor.cpp:453)
==19816==    by 0x16F31FD: mongo::getExecutorFind(mongo::OperationContext*, mongo::Collection*, mongo::NamespaceString const&, mongo::CanonicalQuery*, mongo::PlanExecutor::YieldPolicy, mongo::PlanExecutor**) (get_executor.cpp:641)
==19816==    by 0x16EDEEB: mongo::runQuery(mongo::OperationContext*, mongo::QueryMessage&, mongo::NamespaceString const&, mongo::CurOp&, mongo::Message&) (find.cpp:560)
==19816==    by 0x15B889C: mongo::receivedQuery(mongo::OperationContext*, mongo::NamespaceString const&, mongo::Client&, mongo::DbResponse&, mongo::Message&) (instance.cpp:368)
==19816==    by 0x15B9205: mongo::assembleResponse(mongo::OperationContext*, mongo::Message&, mongo::DbResponse&, mongo::HostAndPort const&) (instance.cpp:504)
==19816==    by 0x128B8A9: mongo::MyMessageHandler::process(mongo::Message&, mongo::AbstractMessagingPort*) (db.cpp:167)
==19816==    by 0x1B12528: mongo::PortMessageServer::handleIncomingMsg(void*) (message_server_port.cpp:227)
==19816==    by 0x640F181: start_thread (pthread_create.c:312)

            Assignee:
            robert.guo@mongodb.com Robert Guo (Inactive)
            Reporter:
            kamran.khan Kamran K.
            Votes:
            0 Vote for this issue
            Watchers:
            6 Start watching this issue

              Created:
              Updated:
              Resolved: