Reading the oplog in a txn is permitted and triggers an invariant

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    • Type: Bug
    • Resolution: Gone away
    • Priority: Major - P3
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    • Affects Version/s: 3.7.9
    • Component/s: Replication
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    • Replication
    • ALL
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      /*
 * Set up cluster.
 */
var r = new ReplSetTest({nodes:2});
r.startSet();r.initiate();

const sessionOptions = {causalConsistency: false};
const session = r.getPrimary().startSession(sessionOptions);

/*
 * Repro
 */
session.startTransaction();
var res = session.getDatabase("local").getCollection("oplog.rs").findOne();
session.commitTransaction();

session.endSession();
      Show
      /* * Set up cluster. */ var r = new ReplSetTest({nodes:2}); r.startSet();r.initiate(); const sessionOptions = {causalConsistency: false }; const session = r.getPrimary().startSession(sessionOptions); /* * Repro */ session.startTransaction(); var res = session.getDatabase( "local" ).getCollection( "oplog.rs" ).findOne(); session.commitTransaction(); session.endSession();
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      Stacktrace:

       /home/guo/mongo/src/mongo/util/assert_util.cpp:104:5: mongo::invariantFailed(char const*, char const*, unsigned int)
 /home/guo/mongo/src/mongo/util/invariant.h:67:9: void mongo::invariantWithLocation<bool>(bool const&, char const*, char const*, unsigned int)
 /home/guo/mongo/src/mongo/db/storage/wiredtiger/wiredtiger_recovery_unit.cpp:225:5: mongo::WiredTigerRecoveryUnit::abandonSnapshot()
 /home/guo/mongo/src/mongo/db/exec/collection_scan.cpp:119:45: mongo::CollectionScan::doWork(unsigned long*)
 /home/guo/mongo/src/mongo/db/exec/plan_stage.cpp:46:29: mongo::PlanStage::work(unsigned long*)
 /home/guo/mongo/src/mongo/db/exec/limit.cpp:64:34: mongo::LimitStage::doWork(unsigned long*)
 /home/guo/mongo/src/mongo/db/exec/plan_stage.cpp:46:29: mongo::PlanStage::work(unsigned long*)
 /home/guo/mongo/src/mongo/db/query/plan_executor.cpp:553:45: mongo::PlanExecutor::getNextImpl(mongo::Snapshotted<mongo::BSONObj>*, mongo::RecordId*)
 /home/guo/mongo/src/mongo/db/query/plan_executor.cpp:404:23: mongo::PlanExecutor::getNext(mongo::BSONObj*, mongo::RecordId*)
 /home/guo/mongo/src/mongo/db/commands/find_cmd.cpp:348:57: mongo::(anonymous namespace)::FindCmd::run(mongo::OperationContext*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, mongo::BSONObj const&, mongo::BSONObjBuilder&)

            Assignee:
            [DO NOT USE] Backlog - Replication Team
            Reporter:
            Robert Guo (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            4 Start watching this issue

              Created:
              Updated:
              Resolved: