org.apache.rocketmq.store.schedule.ScheduleMessageService.DeliverDelayedMessageTimerTask#messageTimeup

[EvanMi]

In this method , the code TopicFilterType topicFilterType = MessageExt.parseTopicFilterType(msgInner.getSysFlag()); means thre topicFilterType will always be SINGLE_TAG ? And why the sysFlag in MessageExt is ignored?

[leizhiyuan]

Here is a bitwise logic