Memory NodeJS 0.3.1应用程序内存泄漏

我有一个相当简单的NodeJS应用程序，它只不过是一个shell，它接受请求并使用可读性形式（基于）解析内容。问题是，我注意到应用程序内存泄漏——我运行了

节点--trace gc

，每次请求时内存都会慢慢积累，偶尔的gc传递什么也不做

$ node --trace-gc server.js 
Scavenge 2.3 -> 2.3 MB, 1 ms.
Mark-sweep 3.5 -> 2.9 MB, 2 ms.
Scavenge 4.4 -> 3.8 MB, 0 ms.
16 Feb 10:57:51 - Server started on PORT 8000
Scavenge 5.9 -> 5.0 MB, 2 ms.
Mark-sweep 5.0 -> 4.2 MB, 3 ms.
Mark-compact 4.2 -> 4.1 MB, 7 ms.
Scavenge 5.2 -> 4.7 MB, 1 ms.
Scavenge 5.5 -> 5.1 MB, 1 ms.
Scavenge 5.9 -> 5.5 MB, 1 ms.
Scavenge 7.1 -> 6.3 MB, 2 ms.
Scavenge 7.8 -> 7.0 MB, 2 ms.
Mark-sweep 8.5 -> 7.6 MB, 10 ms.
Scavenge 11.7 -> 9.7 MB, 4 ms.
Scavenge 12.7 -> 11.2 MB, 5 ms.
Mark-sweep 14.2 -> 12.4 MB, 21 ms.
Scavenge 20.5 -> 16.5 MB, 10 ms.
Scavenge 22.5 -> 19.5 MB, 11 ms.
Mark-sweep 25.5 -> 22.4 MB, 38 ms.
Scavenge 36.6 -> 29.6 MB, 25 ms.
Scavenge 41.6 -> 35.6 MB, 24 ms.
Mark-sweep 46.8 -> 41.1 MB, 75 ms.
Scavenge 46.8 -> 44.0 MB, 33 ms.
Mark-sweep 57.2 -> 50.6 MB, 92 ms.
Scavenge 62.3 -> 56.5 MB, 26 ms.
Scavenge 68.5 -> 62.6 MB, 24 ms.
Scavenge 74.6 -> 68.6 MB, 26 ms.
Mark-sweep 80.6 -> 74.5 MB, 130 ms.
Scavenge 80.5 -> 77.6 MB, 25 ms.
Mark-sweep 77.6 -> 77.4 MB, 112 ms.
Mark-compact 77.4 -> 77.4 MB, 260 ms.

即使在请求停止并且GC有时间运行之后，内存使用也不会减少

我或多或少相信我必须在某个地方分配一个全局变量，但我不知道如何修复它。此项目的代码位于此处：

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有人对我应该做什么有什么建议（和理由吗？

就像PartlyCloudy提到的那样，你应该将你的node.js实例更新到最新的版本0.4.0。希望这个bug已经被修复，否则你可以在github上提交一个over

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我认为Ryan's不会用这个不稳定的旧版本修复任何bug。

我将在这里回答我自己的问题，希望它能帮助其他人解决同样的问题

问题实际上与我在创建服务器时使用的event.emitter有关。当只使用一个连接时，没有内存泄漏（想想开发），但当应用程序开始受到攻击时，大量内存开始攀升，GC什么也没做。我把一个事件监听器放在链中太高了一步，因此我创建了一个从未被破坏的事件监听器

==

坏代码

Readable.prototype.createHTTPServer = function() {
  var self = this;

  var server = http.createServer(function(request, response) {  
    request.addListener('end', function() {
      var  location  = url.parse(request.url, true)
          ,params    = (location.query || request.headers)
          ,body      = "";

      if (location.pathname == '/' && request.method == "GET"){
        if (params["url"] == null){
          response.writeHead(200, {
            'Content-Type': 'text/html'
          });
          response.end("Good to go, you might want to try adding a url param though.");
        }
        else if (params["url"] != null){
          self.fetchAndParse(params["url"], params);
        }
        var listener = emitter.on("readability", function(result) {
          response.writeHead(200, {
            'Content-Type': 'text/html'
          });
          if (result == "error"){
            response.end("error");
          } else {
            response.end(result.content);          
          }
        });
      }
    });
  });
  return server
};

Readable.prototype.createHTTPServer = function() {
  var self = this;

  var server = http.createServer(function(request, response) {  
    request.addListener('end', function() {
      var  location  = url.parse(request.url, true)
          ,params    = (location.query || request.headers)
          ,body      = "";

      if (location.pathname == '/' && request.method == "GET"){
        if (params["url"] == null){
          response.writeHead(200, {
            'Content-Type': 'text/html'
          });
          response.end("Good to go, you might want to try adding a url param though.");
        }
        else if (params["url"] != null){
          self.fetchAndParse(params["url"], params);
          var listener = emitter.on("readability", function(result) {
            response.writeHead(200, {
              'Content-Type': 'text/html'
            });
            if (result == "error"){
              response.end("error");
            } else {
              response.end(result.content);          
            }
          });
        }
      }
    });
  });
  return server
}; 

侦听器变量是从未被销毁的部分。我试图强制删除该变量，但随后响应从未发送到浏览器。答案是，我所要做的就是将侦听器变量移动到

else if

语句中，当函数运行完毕时，它会自动被GC'ed

==

正确的代码

Readable.prototype.createHTTPServer = function() {
  var self = this;

  var server = http.createServer(function(request, response) {  
    request.addListener('end', function() {
      var  location  = url.parse(request.url, true)
          ,params    = (location.query || request.headers)
          ,body      = "";

      if (location.pathname == '/' && request.method == "GET"){
        if (params["url"] == null){
          response.writeHead(200, {
            'Content-Type': 'text/html'
          });
          response.end("Good to go, you might want to try adding a url param though.");
        }
        else if (params["url"] != null){
          self.fetchAndParse(params["url"], params);
        }
        var listener = emitter.on("readability", function(result) {
          response.writeHead(200, {
            'Content-Type': 'text/html'
          });
          if (result == "error"){
            response.end("error");
          } else {
            response.end(result.content);          
          }
        });
      }
    });
  });
  return server
};

Readable.prototype.createHTTPServer = function() {
  var self = this;

  var server = http.createServer(function(request, response) {  
    request.addListener('end', function() {
      var  location  = url.parse(request.url, true)
          ,params    = (location.query || request.headers)
          ,body      = "";

      if (location.pathname == '/' && request.method == "GET"){
        if (params["url"] == null){
          response.writeHead(200, {
            'Content-Type': 'text/html'
          });
          response.end("Good to go, you might want to try adding a url param though.");
        }
        else if (params["url"] != null){
          self.fetchAndParse(params["url"], params);
          var listener = emitter.on("readability", function(result) {
            response.writeHead(200, {
              'Content-Type': 'text/html'
            });
            if (result == "error"){
              response.end("error");
            } else {
              response.end(result.content);          
            }
          });
        }
      }
    });
  });
  return server
}; 

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0.3.1不稳定，0.4.0已发布。你试过了吗？谢谢大家的建议-我在我的开发机器上更新到了0.4.0（服务器已经在0.4.0上了）-但是那没有帮助。见下面我的答案。