C# 静态HttpClient，但仍有太多打开的套接字_C#_Asp.net Mvc_Iis_Dotnet Httpclient

C# 静态HttpClient，但仍有太多打开的套接字

c# asp.net-mvc iis

C# 静态HttpClient，但仍有太多打开的套接字,c#,asp.net-mvc,iis,dotnet-httpclient,C#,Asp.net Mvc,Iis,Dotnet Httpclient,我使用的是static Lazy，它应该确保套接字被重用。（）然而，我的应用程序在数百次请求后冻结。我已经添加了跟踪日志记录，并且可以在MVC操作中重现该问题，该操作除了调用HttpClient之外什么都不做显式地说，它读取web.config值，验证一些ViewModel值，并解析HttpClient响应，但这永远不会出现 netstat显示存在大量打开的套接字。即使是现在，几分钟后，在我停止请求并花了一些时间写这个问题之后，套接字的数量似乎并没有减少 C:\Users\me>n

我使用的是

static Lazy

，它应该确保套接字被重用。（）

然而，我的应用程序在数百次请求后冻结。我已经添加了跟踪日志记录，并且可以在MVC操作中重现该问题，该操作除了调用HttpClient之外什么都不做

显式地说，它读取web.config值，验证一些ViewModel值，并解析HttpClient响应，但这永远不会出现

netstat

显示存在大量打开的套接字。即使是现在，几分钟后，在我停止请求并花了一些时间写这个问题之后，套接字的数量似乎并没有减少

C:\Users\me>netstat

Active Connections

  Proto  Local Address          Foreign Address        State
  TCP    127.0.0.1:443          localhost:53730            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53731            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53732            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53733            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53734            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53736            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53737            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53738            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53739            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53740            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53741            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53743            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53751            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53752            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53753            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53754            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53755            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53760            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53765            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53766            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53767            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53768            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53769            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53773            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53776            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53777            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53778            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53779            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53780            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53784            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53787            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53788            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53789            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53790            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53791            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53795            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53798            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53799            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53800            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53801            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53802            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53806            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53808            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53809            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53810            TIME_WAIT
  TCP    127.0.0.1:443          localhost:53811            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53812            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53813            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53814            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53815            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53816            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53817            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53818            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53819            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53820            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53821            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53822            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53823            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53824            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53825            CLOSE_WAIT
  TCP    127.0.0.1:443          localhost:53851            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53852            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53853            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53854            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53855            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53856            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53857            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53858            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53859            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53860            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53861            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53862            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53863            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53864            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53865            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53866            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53867            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53868            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53869            ESTABLISHED
  TCP    127.0.0.1:443          localhost:53870            ESTABLISHED
  TCP    127.0.0.1:44117        localhost:53301            ESTABLISHED
  TCP    127.0.0.1:44117        localhost:53838            ESTABLISHED
  TCP    127.0.0.1:44117        localhost:53839            ESTABLISHED
  TCP    127.0.0.1:44117        localhost:53840            ESTABLISHED
  TCP    127.0.0.1:44117        localhost:53841            ESTABLISHED
  TCP    127.0.0.1:44117        localhost:53842            ESTABLISHED
  TCP    127.0.0.1:49676        localhost:49677            ESTABLISHED
  TCP    127.0.0.1:49677        localhost:49676            ESTABLISHED
  TCP    127.0.0.1:50498        localhost:50501            ESTABLISHED
  TCP    127.0.0.1:50501        localhost:50498            ESTABLISHED
  TCP    127.0.0.1:53301        localhost:44117            ESTABLISHED
  TCP    127.0.0.1:53697        localhost:53698            ESTABLISHED
  TCP    127.0.0.1:53698        localhost:53697            ESTABLISHED
  TCP    127.0.0.1:53699        localhost:53700            ESTABLISHED
  TCP    127.0.0.1:53700        localhost:53699            ESTABLISHED
  TCP    127.0.0.1:53701        localhost:53702            ESTABLISHED
  TCP    127.0.0.1:53702        localhost:53701            ESTABLISHED
  TCP    127.0.0.1:53703        localhost:53704            ESTABLISHED
  TCP    127.0.0.1:53704        localhost:53703            ESTABLISHED
  TCP    127.0.0.1:53705        localhost:53706            ESTABLISHED
  TCP    127.0.0.1:53706        localhost:53705            ESTABLISHED
  TCP    127.0.0.1:53707        localhost:53708            ESTABLISHED
  TCP    127.0.0.1:53708        localhost:53707            ESTABLISHED
  TCP    127.0.0.1:53709        localhost:53710            ESTABLISHED
  TCP    127.0.0.1:53710        localhost:53709            ESTABLISHED
  TCP    127.0.0.1:53711        localhost:53712            ESTABLISHED
  TCP    127.0.0.1:53712        localhost:53711            ESTABLISHED
  TCP    127.0.0.1:53713        localhost:53714            ESTABLISHED
  TCP    127.0.0.1:53714        localhost:53713            ESTABLISHED
  TCP    127.0.0.1:53715        localhost:53716            ESTABLISHED
  TCP    127.0.0.1:53716        localhost:53715            ESTABLISHED
  TCP    127.0.0.1:53717        localhost:53718            ESTABLISHED
  TCP    127.0.0.1:53718        localhost:53717            ESTABLISHED
  TCP    127.0.0.1:53719        localhost:53720            ESTABLISHED
  TCP    127.0.0.1:53720        localhost:53719            ESTABLISHED
  TCP    127.0.0.1:53721        localhost:53722            ESTABLISHED
  TCP    127.0.0.1:53722        localhost:53721            ESTABLISHED
  TCP    127.0.0.1:53723        localhost:53724            ESTABLISHED
  TCP    127.0.0.1:53724        localhost:53723            ESTABLISHED
  TCP    127.0.0.1:53725        localhost:53726            ESTABLISHED
  TCP    127.0.0.1:53726        localhost:53725            ESTABLISHED
  TCP    127.0.0.1:53727        localhost:53728            ESTABLISHED
  TCP    127.0.0.1:53728        localhost:53727            ESTABLISHED
  TCP    127.0.0.1:53730        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53735        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53742        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53744        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53745        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53746        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53747        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53748        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53749        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53750        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53751        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53758        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53761        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53762        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53763        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53765        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53770        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53771        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53772        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53773        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53775        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53781        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53782        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53783        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53784        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53786        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53792        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53793        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53794        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53795        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53797        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53803        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53804        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53805        localhost:https            TIME_WAIT
  TCP    127.0.0.1:53806        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53808        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53811        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53812        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53813        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53814        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53815        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53816        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53817        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53818        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53819        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53820        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53821        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53822        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53823        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53824        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53825        localhost:https            FIN_WAIT_2
  TCP    127.0.0.1:53838        localhost:44117            ESTABLISHED
  TCP    127.0.0.1:53839        localhost:44117            ESTABLISHED
  TCP    127.0.0.1:53840        localhost:44117            ESTABLISHED
  TCP    127.0.0.1:53841        localhost:44117            ESTABLISHED
  TCP    127.0.0.1:53842        localhost:44117            ESTABLISHED
  TCP    127.0.0.1:53851        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53852        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53853        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53854        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53855        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53856        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53857        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53858        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53859        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53860        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53861        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53862        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53863        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53864        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53865        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53866        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53867        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53868        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53869        localhost:https            ESTABLISHED
  TCP    127.0.0.1:53870        localhost:https            ESTABLISHED
snip

我有两次出现HttpClient，都有一个单独的

基地址。我尝试用Easy.Common.RestClient替换HttpClient，但没有成功
我准备好了
var servicePoint = ServicePointManager.FindServicePoint(new Uri(webApiAddress));
servicePoint.ConnectionLeaseTimeout = (int)TimeSpan.FromMinutes(1).TotalMilliseconds;

但这也没用。
我已将超时设置为15秒。我已尝试设置CloseConnection=true
或设置标题“Connection”：“Close”

我不知道该试什么了。。。有人能提供指导吗
更新
让我们详细讨论一下。我在类库中的类MyClientWrapper
中有一个静态惰性
（示例）。我的Asp.NETMVC5应用程序包括这个类库，并实例化了MyClientWrapper

我的MVC控制器调用myClientWrapper.GetData（）

。在

GetData

内部，创建了一条

HttpRequestMessage

，并使用

HttpClient

发送到我的API。读取

HttpResponseMessage

。请求和响应都被释放，数据从

GetData

我正在使用Gatling向20个用户发出20个请求，请求

MyController/MyAction

。在某个时刻（有时更早，有时更晚），不再有任何请求到达API。在MyController中放置调试断点将显示命中了

GetData（）

。

wait

调用被命中，就这样<代码>netstat已满

我已经试着解决这个问题了

场景1：使用PostMan ping API（在我遇到任何问题之前）。没有问题

场景2：从

GetData（）

中删除所有代码，并替换为

returnsomedummydata

public async Task<Data> GetData()
{
    // No call to HttpClient, no issues
    return new Data();
}

更新

将
```
HttpClient
```
从
```
static
```
更改为
```
PerThread
```
（Castle Windsor IoC）没有任何区别
有趣的是，每当出现挂起时，IIS中WorkerProcess下正好有三个请求。每一次。正好三个。这是否与HttpClient的最大连接数（默认值2）有关
我已经验证了我的API的
```
ping
```
方法内部没有逻辑。事实并非如此

更新

可能与此相关：

换句话说，这种用法正在破坏您的软件的稳定性？J/k，我肯定没问题。您在开始测试之前是否运行了

netstat

？有几件事。。。您正在从同一台计算机上的客户端连接到服务器，因此所有连接都将列出两次。。。从/到同一台机器的任何其他连接也将列出两次（就像每次在浏览器中打开页面以确保服务器仍在响应时一样）。。。仅仅因为你关闭了“你的终端”上的连接并不意味着服务器会。从您链接的文章中，您应该针对他们的Azure服务器进行测试。感谢您的回复，并指出他们已列出两次。我以前确实运行过

netstat

。我回收了所有的应用程序池，重新启动了我的应用程序，重新启动了我的笔记本电脑。在

netstat

中仅使用了1个套接字。然后，开始了我的测试，砰的一声。我不使用Azure，但今天晚些时候我可能可以在单独的服务器上进行测试。作为见证，我在几周前的搜索历史记录中添加了一些说明。。我有点担心。我承认我没有深入研究MVC和AppPool中的

静态

行为。你有什么建议吗？或者这主要是一种预感？充其量只是一种预感。。。基于我对IIS应用程序池的有限（几乎不存在）理解。我要向上投票，因为我也想知道，并添加一些标签，可能会吸引正确的人回答这个问题。换句话说，这种用法正在破坏你的软件的稳定性？J/k，我肯定没问题。您在开始测试之前是否运行了

netstat

netstat

。我回收了所有的应用程序池，重新启动了我的应用程序，重新启动了我的笔记本电脑。在

netstat

静态

行为。你有什么建议吗？或者这主要是一种预感？充其量只是一种预感。。。基于我对IIS应用程序池的有限（几乎不存在）理解。我将向上投票，因为我也想知道，并添加一些标签，以吸引正确的人回答这个问题。

public async Task<Data> GetData()
{
    // Issue occurs as soon as HttpClient is used for GET or POST. In this example, GET.
    await _client.GetAsync("pseudocode/Ping");
    // In reality I properly HttpRequestMessage/HttpResponseMessage read and dispose, this is just pseudocode really... 
    return new Data();
}