Cometd Seti getUserIds（）和getPresenceCount（userId）交替返回空列表

Question

seti.getUserIds（））在 publishMessage 方法上返回空列表。客户端未断开连接，并且未触发seti presenceRemoved。但是，seti.getUserIds（））在 listenMetaChannel 中返回正确值的userId列表。在publishMessage方法中，Seti不是Null。 Seti适当地注入了这门课程。

@Singleton
    @Named 
    @Service("notificationService")
    public class NotificationService {

        @Session
        private ServerSession serverSession;
        private Logger logger = Logger.getLogger(this.getClass());

        @Autowired
        private BayeuxServer bayeuxServer;

        @Autowired
        private Seti seti;

        @Configure("/notification")
                public void configureChannel(ConfigurableServerChannel channel)
                {
                    channel.setPersistent(true);// channel persistent
                    channel.addAuthorizer(GrantAuthorizer.GRANT_ALL);   
                    //channel.setLazy(true);

                }


        public void publishMessage( String messageId ,String userId)
        {
            logger.debug("Seti Session USERS::"+seti.getUserIds()); 

            String  userId="568";
            boolean userPresent=seti.isPresent(userId);
                if(userPresent){
                     Map<String, Object> push_data= new HashMap<String, Object>();
                     push_data.put("messageId", messageId);
                    seti.sendMessage(userId, "/channel", push_data);
                }else
                {
                    logger.debug("User ::"+userId+" Session Absent !! ");
                }


     } 

            @Listener(Channel.META_CONNECT)  
            public void listenMetaChannel(ServerSession remote, ServerMessage message)
            {   

                logger.debug("Seti Session USERS::"+seti.getUserIds());

            }

    }