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/conn/conn_compact.c:695: MISSING_LOCK 138589 Accessing "conn->background_compact.running" without holding lock "_wt_spinlock.lock". Elsewhere, "wt_background_compact.running" is accessed with "_wt_spinlock.lock" held 2 out of 3 times (1 of these accesses strongly imply that it is necessary).