Delayed message lock shorter

server/server.go

@@ -1080,7 +1080,8 @@ func (s *Server) topicsFromIDs(ids ...string) ([]*topic, error) {
 }
 
 func (s *Server) updateStatsAndPrune() {
-	log.Debug("Manager: Running cleanup")
+	log.Debug("Manager: Starting")
+	defer log.Debug("Manager: Finished")
 
 	// WARNING: Make sure to only selectively lock with the mutex, and be aware that this
 	//          there is no mutex for the entire function.
@@ -1232,10 +1233,10 @@ func (s *Server) sendDelayedMessages() error {
 }
 
 func (s *Server) sendDelayedMessage(v *visitor, m *message) error {
-	s.mu.Lock()
-	defer s.mu.Unlock()
 	log.Debug("%s Sending delayed message", logMessagePrefix(v, m))
+	s.mu.Lock()
 	t, ok := s.topics[m.Topic] // If no subscribers, just mark message as published
+	s.mu.Unlock()
 	if ok {
 		go func() {
 			// We do not rate-limit messages here, since we've rate limited them in the PUT/POST handler