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/repl/initial_syncer.cpp:1318: MISSING_LOCK 174997 Accessing "this->_clonerAttemptExec" without holding lock "mongo::repl::InitialSyncer._mutex". Elsewhere, "mongo::repl::InitialSyncer._clonerAttemptExec" is written to with "InitialSyncer._mutex" held 3 out of 3 times.