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/oplog_fetcher.cpp:823: MISSING_LOCK 144333 Accessing "this->_oplogFetcherRestartDecision" without holding lock "mongo::repl::OplogFetcher._mutex". Elsewhere, "mongo::repl::OplogFetcher._oplogFetcherRestartDecision" is written to with "OplogFetcher._mutex" held 1 out of 1 times.