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/s/balancer/balancer_commands_scheduler_impl.cpp:169: MISSING_LOCK 141922 Accessing "this->_workerThreadHandle" without holding lock "mongo::BalancerCommandsSchedulerImpl._mutex". Elsewhere, "mongo::BalancerCommandsSchedulerImpl._workerThreadHandle" is written to with "BalancerCommandsSchedulerImpl._mutex" held 1 out of 1 times.