No load balancer is going to failover on a 404. Go to Advanced Settings. If I kill the aspnet_wp.exe it recovers and everything is fine again. 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 User-408987462 posted I found reason of my problem in this blog post . 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. Troubleshooting for IIS 7 and above https: . 2. Which URLs are involved 2. During a heavy development/debugging session, very occasionally IIS will seem to stop responding to asp.net requests. You will need this ID to determine which W3SVC* directory to analyze. and navigate to Process Model and Identity. The Web server can > load other pages fine. Whether all requests to the app are hanging or just specific URLs 3. This will show you the ID of each website hosted on your server. Archived Forums > Troubleshooting for IIS 7 and above. When the WSUS server role was installed, it installed the XPress compression schema module (suscomp.dll) that loaded in every application pool in IIS. We are now finding that IIS > will just stop responding to requests for our site's pages after a > certain amount of time. After that, ping and request to the IIS server coming from the external works. API reference; Downloads; Samples; Support It looks like the server is in hibernation or . However, occasionally, the web service has to be stopped and restarted before things start working again. Looks like http.sys is responding with a 404 even though the website is stopped. 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. From localhost PS: > telnet 127.0.0.1 80 GET / HTTP/1.1 HTTP/1.1 400 Bad Request [ etc. ] PID 8180 corresponds to the svchost.exe process for IIS. However, requests to the IP (not to localhost) to the web site run fine. IIS stops responding to http requests. If not, then DLLHost.exe takes the request. Every couple of hours IIS resets itself. etc. 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). The only way i can make the IIS works fine is to open a web browser and then browse to a web site. There are no errors in the Windows event logs. Recycling the App Pool and even restarting the site will not allow the site to . 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. In the Request queue limit section, select the Limit the kernel request queue to check box, and type the maximum number of queued requests. Windows Dev Center Home ; UWP apps; Get started; Design; Develop; Publish; Resources . Windows Dev Center Home ; UWP apps; Get started; Design; Develop; Publish; Resources . In this troubleshooter, I will be using IIS 8. If you right-click or double click an app pool instance there, you MAY see also a "request monitor". An external page request will restart the app. IIS 7.5 stops serving external requests randomly 2 Running IIS 7.5 on Windows 2008 R2. You could also perhaps work around this by not calling the second . An IIS website hangs whenever it appears to stop serving incoming requests, with requests either taking a very long time or timing out. However, requests to the IP (not to localhost) to the web site run fine. This is apparently done so as to fix up any memory leaks, resource deadlocks etc. 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. 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. Click the Performance tab. In IIS Manager, expand the local computer, expand the Application Pools folder, right-click the application, and then click Properties. When this happens, I RDP into the server and refresh the browser on the server. > 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. 1-~10 times a week, usually over the weekend, our website will stop responding to external requests. It appears to be running but we cannot load any > of our site's pages, even on the Web server itself. Sporadically about, every 2-3 weeks IIS stops responding to requests. No breakpoints inside of the ActionResult get hit though, so I know it isn't getting called. Open the IIS Manager and select Sites, as shown in Figure 1. This problem has existed for the life of the project. API reference; Downloads; Samples; Support Inetinfo.exe or DLLHost.exe determines if the request is valid. 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. Check your httperr.log in system32\logfiles\httperr and you'll see it sending a 404 when you hit the stopped website. I can't even view http://localhost on the machine, get page cannot be found. Additional troubleshooting steps (but potentially unsafe): For a unknown reason, one of our IIS server stops responding to external request after a couple of minutes/hours. Figure 1: Getting the ID of your web site 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 ". If the requested application is running in-process, then Inetinfo.exe takes the request. [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. There, select the Enable box. 30-45 min), the IIS service stops responding to browser requests (although the service shows it is running in the service manager). 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. Every couple more hours (I think I read 23 hours) the server just stops listening to inbound requests and runs Application_End. 1 IIS with an exchange back-end isn't responding to valid queries, but will throw 400 Bad Request for invalid queries. This can be done by having the handlers implement the IReadOnlySessionState instead of IRequiresSessionState. 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. > running IIS 5, and using ASP with SQL 7. Problem #2: Installing ASP.NET Core Runtime I'm having the same issue and it's causing problems with our load balancer as well. 2. Quite often, this lasts for a minute or so and then all is well. The module/request stage they are hanging in. Restart all the web related services, but still doesn't respond to web requests. If the 32-bit version of suscomp.dll is loaded in an application pool that runs in 64-bit mode, you experience this issue. 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. All relevant services respond to shutdown, and start up. Before an IIS process receives a request to execute, some preliminary processing occurs that is described in the following steps: A request arrives. 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). If the requests are currently hanging, this will instantly show you 3 critical things: 1. Next, get a detailed request trace 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). I keep a browser window open on the server pointed to the internal IP. Click OK. ie.