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/util/concurrent_shared_values_map.h:157: MISSING_LOCK 151229 Accessing "this->_map" without holding lock "mongo::ConcurrentSharedValuesMap<mongo::UUID, mongo::PreImagesTruncateMarkersPerNsUUID, mongo::UUID::Hash>._mapModificationMutex". Elsewhere, "mongo::ConcurrentSharedValuesMap<mongo::UUID, mongo::PreImagesTruncateMarkersPerNsUUID, mongo::UUID::Hash>._map" is written to with "ConcurrentSharedValuesMap._mapModificationMutex" held 2 out of 2 times.