fix runlock bug
@@ -355,8 +355,11 @@ func (s *watchableStore) syncWatchers() int {
tx := s.store.b.ReadTx()
tx.RLock()
revs, vs := tx.UnsafeRange(schema.Key, minBytes, maxBytes, 0)
- tx.RUnlock()
evs := kvsToEvents(s.store.lg, wg, revs, vs)
+ // Must unlock after kvsToEvents, because vs (come from boltdb memory) is not deep copy.
+ // We can only unlock after Unmarshal, which will do deep copy.
+ // Otherwise we will trigger SIGSEGV during boltdb re-mmap.
+ tx.RUnlock()
victims := make(watcherBatch)
wb := newWatcherBatch(wg, evs)
