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/serverless/shard_split_donor_service.cpp:1140: MISSING_LOCK 170906 Accessing "this->this->_stateDoc" without holding lock "mongo::ShardSplitDonorService::DonorStateMachine._mutex". Elsewhere, "mongo::ShardSplitDonorService::DonorStateMachine._stateDoc" is written to with "DonorStateMachine._mutex" held 10 out of 10 times.