这两天纠结于一个生产问题，麻烦大神有时间帮忙看看。

1、server1：nodejs写的一个webserver，主要负责消息转发，逻辑很简单。 2、server2：tomcat起的一个webserver，负责业务处理

server1通过http请求到server2的时候，发现某种情况下会很慢，一个http请求出去，发现server2半小时后才收到，找不到原因，摸不到头脑，麻烦大神帮忙看看。

有两个问题来着： 1、为何这个请求迟迟不不到sip那边（server1上同时起了其他nodejs服务server3，server3到server2是正常的） 2、有没有中间件可以查询出来nodejs服务有哪些任务正在排队？

server1请求server2的代码如下：

/**

• 执行发送信息给SIP

• [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[@param](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param) microLetter 微信号

• [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[@param](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param) type 类型

• [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[@param](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param) content 内容：文本为文本内容；语音、图片为nas上文件路径

• [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[@param](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param) messageId 消息ID

• [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[@param](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param)](/user/param) callback 回调方法 */ var sendMsgToSipAction = exports.sendMsgToSipAction = function(messageObj, callback) { logger.info(‘准备发送消息给SIP’); var rtnObj = {};

  if (messageObj.type == constants.msg_type.msg_image || messageObj.type == constants.msg_type.msg_voice) { //图片或语音 //messageObj.content = (‘filepath=’ +messageObj.content); }

  var msg = JSON.stringify(messageObj); logger_sip.debug(‘发送给SIP区的消息内容：%s’ , msg);

  //post数据 var post_data = querystring.stringify({ //encodeURIComponent防止出现空格、特殊符号等问题，SIP端要decode message: encodeURIComponent(msg)

  });

  var options = { host: sysconf.sip_server.sip_host, port: sysconf.sip_server.sip_port, path: sysconf.sip_server.sip_path + '?’, method: 'POST’, headers: { 'Content-Type’: 'application/x-www-form-urlencoded’, 'Content-Length’: post_data.length } }; var reqToSip = http.request(options, function (resToSip) {

   var resStatus = resToSip.statusCode;
   logger.debug('发送消息给SIP返回STATUS:' , resStatus);
   //如果返回错误，需做处理
   resToSip.setEncoding('utf8');
   var all_data ='';
   resToSip.on('data', function (body) {
       all_data = all_data + body;
   });
   resToSip.on('end', function () {
       logger.debug('发送消息给SIP返回完整BODY:%s',all_data);
       if (resStatus == "200" && all_data) {
           try{
               //SIP区回复内容不可信，防止把应用搞挂了
               var bodyObj = JSON.parse(all_data);
               if (bodyObj.resMsg.code == "SIP000") {
                   //sip区反馈处理成功
                   rtnObj.rtnFlag = "ok";
                   rtnObj.messageObj = messageObj;
                   callback(rtnObj);
               }else if(bodyObj.resMsg.code == "SIP002"){
                 rtnObj.rtnFlag = "reply";
                   rtnObj.rtnMsg = bodyObj.resMsg.msg;
                   callback(rtnObj);
               } else {
                   callback({rtnFlag:constants.rtn_flag.error,rtnMsg:'发送信息给SIP区发生异常：'+ all_data});
               }
           }catch(e){
               logger.error('发送信息给SIP区发生异常:', e.message);
               callback({rtnFlag:constants.rtn_flag.error,rtnMsg:'发送信息给SIP区发生异常：'+ e.message});
               return;
           }
  
  
       }else{
           logger.error("发送信息给SIP区发生异常。");
           rtnObj.rtnFlag = "error";
           rtnObj.rtnMsg = "发送信息给SIP区发生异常。";
           callback(rtnObj);
           return;
       }
  
   });
  

  });

  reqToSip.write(post_data); reqToSip.end(); reqToSip.on('error’, function (e) { logger.error(“系统异常，未成功发送到服务人员，请稍后再试。:” + e.message); rtnObj.rtnFlag = "error"; rtnObj.rtnMsg = "系统异常，未成功发送到服务人员，请稍后再试。"; callback(rtnObj); return; }); }