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/modules/enterprise/src/fcbis/file_copy_based_initial_syncer.cpp:269: MISSING_LOCK 155014 Accessing "this->this->_attemptCancellationSource" without holding lock "mongo::repl::FileCopyBasedInitialSyncer._mutex". Elsewhere, "mongo::repl::FileCopyBasedInitialSyncer._attemptCancellationSource" is written to with "FileCopyBasedInitialSyncer._mutex" held 1 out of 1 times.