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/261f65657bd114359a8e3a064d6e450e/bazel_cache/54c751a1c930d7b7fb2afe7fb4a68167/execroot/_main/src/mongo/db/repl/shard_merge_recipient_service.cpp:612: MISSING_LOCK 145949 Accessing "this->_dataConsistentPromise" without holding lock "mongo::repl::ShardMergeRecipientService::Instance._mutex". Elsewhere, "mongo::repl::ShardMergeRecipientService::Instance._dataConsistentPromise" is written to with "Instance._mutex" held 2 out of 2 times.