Data race condition

The value of the shared data will be determined by the interleaving of thread execution. Thread shared data is accessed without holding an appropriate lock, possibly causing a race condition
/src/mongo/db/default_baton.cpp:183: MISSING_LOCK 148718 Accessing "this->_opCtx" without holding lock "mongo::DefaultBaton._mutex". Elsewhere, "mongo::DefaultBaton._opCtx" is written to with "DefaultBaton._mutex" held 2 out of 2 times.