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
/data/mci/4fce031de9267fb3c47945a835ecc176/bazel_cache/e4de32cbb3cd53654b52f9247a499e3e/execroot/_main/src/mongo/db/repl/oplog_fetcher.cpp:375: MISSING_LOCK 145359 Accessing "this->_onShutdownCallbackFn" without holding lock "mongo::repl::OplogFetcher._mutex". Elsewhere, "mongo::repl::OplogFetcher._onShutdownCallbackFn" is written to with "OplogFetcher._mutex" held 1 out of 1 times.