use UTC for all time related folders

weed/messaging/broker/broker_grpc_server_subscribe.go

@@ -125,6 +125,7 @@ func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_Subs
 }
 
 func (broker *MessageBroker) readPersistedLogBuffer(tp *TopicPartition, startTime time.Time, eachLogEntryFn func(logEntry *filer_pb.LogEntry) error) (err error) {
+	startTime = startTime.UTC()
 	startDate := fmt.Sprintf("%04d-%02d-%02d", startTime.Year(), startTime.Month(), startTime.Day())
 	startHourMinute := fmt.Sprintf("%02d-%02d.segment", startTime.Hour(), startTime.Minute())
 

weed/messaging/broker/topic_manager.go

@@ -56,6 +56,7 @@ func (tm *TopicManager) buildLogBuffer(tl *TopicControl, tp TopicPartition, topi
 
 		// fmt.Printf("flushing with topic config %+v\n", topicConfig)
 
+		startTime, stopTime = startTime.UTC(), stopTime.UTC()
 		targetFile := fmt.Sprintf(
 			"%s/%s/%s/%04d-%02d-%02d/%02d-%02d.part%02d",
 			filer2.TopicsDir, tp.Namespace, tp.Topic,