Every couple more hours (I think I read 23 hours) the server just stops listening to inbound requests and runs Application_End. Which URLs are involved 2. Inetinfo.exe or DLLHost.exe determines if the request is valid. In the Request queue limit section, select the Limit the kernel request queue to check box, and type the maximum number of queued requests. An IIS website hangs whenever it appears to stop serving incoming requests, with requests either taking a very long time or timing out. As a test, I let the page try to load for about 20 minutes before closing Internet Explorer 7 (our users also use IE 7). User-408987462 posted I found reason of my problem in this blog post . When performing a security scan against an IIS 6 server, the web site stops responding to requests from outside the firewall and from machines on the LAN about 35 minutes into the scan. Looks like http.sys is responding with a 404 even though the website is stopped. If the requested application is running in-process, then Inetinfo.exe takes the request. Open the IIS Manager and select Sites, as shown in Figure 1. It looks like the server is in hibernation or . Then, to enable IIS to generate these logs, you need to do two things: 1) Enable Failed Request Tracing for the site you want to trace In InetMgr, select your site in the left-hand tree view, then under Actions on the right click "Failed Request Tracing ". 2. 30-45 min), the IIS service stops responding to browser requests (although the service shows it is running in the service manager). When the WSUS server role was installed, it installed the XPress compression schema module (suscomp.dll) that loaded in every application pool in IIS. Before an IIS process receives a request to execute, some preliminary processing occurs that is described in the following steps: A request arrives. The primary purpose of that tool is to show running instances of IIS application pools, including their windows process Id (corresponding to the PID shown in Task Manager for the w3wp.exe running that pool instance). It seems to be a cleanup operation. The possible downside is, of course, that the handlers will not have access to store/update the Session, but the upside is that more than one request can run in parallel. If the requests are currently hanging, this will instantly show you 3 critical things: 1. PID 8180 corresponds to the svchost.exe process for IIS. Recycling the App Pool and even restarting the site will not allow the site to . No breakpoints inside of the ActionResult get hit though, so I know it isn't getting called. After that, ping and request to the IIS server coming from the external works. An external page request will restart the app. This will show you the ID of each website hosted on your server. Figure 1: Getting the ID of your web site We are now finding that IIS > will just stop responding to requests for our site's pages after a > certain amount of time. API reference; Downloads; Samples; Support You could also perhaps work around this by not calling the second . I'm having the same issue and it's causing problems with our load balancer as well. I keep a browser window open on the server pointed to the internal IP. Problem #2: Installing ASP.NET Core Runtime Check your httperr.log in system32\logfiles\httperr and you'll see it sending a 404 when you hit the stopped website. If not, then DLLHost.exe takes the request. The IIS Express logs do not show any requests when this happens; however, in debug mode, VS can see that the browser did make a request. Archived Forums > Troubleshooting for IIS 7 and above. > telnet 127.0.0.1 80 GET / HTTP/1.1 [no reply] This is the same error from other hosts, and IIS is listening on 443, 80, and 444. The only way i can make the IIS works fine is to open a web browser and then browse to a web site. It's generally caused by all available application threads becoming blocked, causing subsequent requests to get queued (or sometimes by the number of active requests exceeding configured concurrency limits). Every couple of hours IIS resets itself. If I kill the aspnet_wp.exe it recovers and everything is fine again. IIS 7.5 stops serving external requests randomly 2 Running IIS 7.5 on Windows 2008 R2. ie. IIS stops responding to http requests. When this happens, I RDP into the server and refresh the browser on the server. Windows Dev Center Home ; UWP apps; Get started; Design; Develop; Publish; Resources . and navigate to Process Model and Identity. So if you have one request running, and during that request you are trying to run another request in the same session, then you are effectively deadlocking yourself. Check the Application Pool Identity in IIS when running an ASP.NET Core Application If you are using a Custom Account, you will probably need to give full permissions to that account as well. However, requests to the IP (not to localhost) to the web site run fine. There are no errors in the Windows event logs. [Solved]-IIS stops responding to requests until restart after running this method-C# Search score:1 Accepted answer By default, Asp.Netallows only one concurrent request per Session. It appears to be running but we cannot load any > of our site's pages, even on the Web server itself. Click OK. The module/request stage they are hanging in. 1 IIS with an exchange back-end isn't responding to valid queries, but will throw 400 Bad Request for invalid queries. For a unknown reason, one of our IIS server stops responding to external request after a couple of minutes/hours. Restart all the web related services, but still doesn't respond to web requests. Quite often, this lasts for a minute or so and then all is well. However, occasionally, the web service has to be stopped and restarted before things start working again. Additional troubleshooting steps (but potentially unsafe): Other non-asp.net stuff works but asp.net requests (even for other web apps than the one I'm debugging) dont't even appear in the IIS log. All relevant services respond to shutdown, and start up. You will need this ID to determine which W3SVC* directory to analyze. Go to Advanced Settings. During a heavy development/debugging session, very occasionally IIS will seem to stop responding to asp.net requests. From localhost PS: > telnet 127.0.0.1 80 GET / HTTP/1.1 HTTP/1.1 400 Bad Request [ etc. ] Whether all requests to the app are hanging or just specific URLs 3. No load balancer is going to failover on a 404. Once the pages start to hang on loading, the only way to get the pages to respond again is to stop/restart the IIS services. Next, get a detailed request trace Troubleshooting for IIS 7 and above https: . There, select the Enable box. Iis - localhost works 127.0.0.1 does not IIS; IIS web site stops responding to requests on Port 80; Iis - Why doesn't IIS 7.5 FTP respect the passive port range for plain ftp; Why isn't IIS logging the 400, or What is responding with 400 In this troubleshooter, I will be using IIS 8. etc. When performing a security scan against an IIS 6 server, the web site stops responding to requests from outside the firewall and from machines on the LAN about 35 minutes into the scan. 1-~10 times a week, usually over the weekend, our website will stop responding to external requests. Click the Performance tab. This can be done by having the handlers implement the IReadOnlySessionState instead of IRequiresSessionState. In IIS Manager, expand the local computer, expand the Application Pools folder, right-click the application, and then click Properties. This is apparently done so as to fix up any memory leaks, resource deadlocks etc. > running IIS 5, and using ASP with SQL 7. However, requests to the IP (not to localhost) to the web site run fine. I can't even view http://localhost on the machine, get page cannot be found. This problem has existed for the life of the project. If you right-click or double click an app pool instance there, you MAY see also a "request monitor". Sporadically about, every 2-3 weeks IIS stops responding to requests. Windows Dev Center Home ; UWP apps; Get started; Design; Develop; Publish; Resources . To pinpoint it to being a IIS issue and not firewall/routing issue you could stop the IIS service and run a simple application like PortListener and configure it to listen on port 80, after doing that telnet to your private IP on port 80 from another machine and see if telnet connects. If the 32-bit version of suscomp.dll is loaded in an application pool that runs in 64-bit mode, you experience this issue. 2. The Web server can > load other pages fine. API reference; Downloads; Samples; Support