I hosted ASP.NET Web App. to IIS6.
When I run Web App., The w3wp.exe process will terminate and the sessions will be lost.
I use traditional In-Process Session State.
This Page have many Process to calculate.
But in some machine that also running this Web in IIS6, It can run and have no problem. So this problem occurs in some machine.
My machine is Core2Duo CPU running on Windows Server 2003
4GB of RAM
I try to configure IIS6 to disable all events of Worker Process Recycle, but I still cannot work.
What I should do?
Thanks
Related
We have a simple .net application running crystal reports in an Azure VM. We have some code that detects if the application has restarted, and this application is restarting often.
protected void Application_Start()
{
if (!HttpContext.Current.IsDebuggingEnabled)
SendgridService.SendAppRestartEmail();
}
I suspect the application is going to sleep or something is triggering the restart, but cant work out what.
After doing a lot of searching I am posting here to see if anyone can help
Most likely the problem is that your AppPool is getting recycled because of the low usage.
You'll need to adjust timeout settings. See the following articles:
Recycling Settings for an Application Pool
IIS: Idle Timeout vs Recycle
How To Configure Idle Time-out Settings For An Application Pool (IIS 7)
I'm using a HostedService inside an ASP.NET core web api that will be deployed in an IIS instance on premise (.NET Core 2.2). I need to ensure that the idle timeout is set to zero to ensure the background service will run continuously and I believe this can be done by setting the idle timeout on the application pool to zero. This would, however, require the IIS administrator to perform this action upon setup so I was wondering if there is a way to configure kestrel with a zero idle timeout when its first configured in the CreateWebHostBuilder() method of the program class.
Is this possible?
When you use IIS as a reverse proxy for an ASP.NET Core application, IIS starts the process and that idle timeout on the app pool decides when to shut down the process. IIS knows that there are no active requests, and it will just kill the process without asking the process for permission. So there is no way for your application to stop that. (You have to be aware of that if you run any background jobs in your application - IIS doesn't know about those and could kill your app in the middle of something running)
If you run without IIS, it would never automatically shut down at all, since shutting down means that nothing is listening for new connections anymore. That's the benefit of using IIS: it can restart your application if there is a catastrophic failure.
So if you plan on keeping your application behind IIS, and you want it to never shut down, then you will have to get the settings on the app pool changed.
I have an IIS server version 8.5. I have web site and a number of web-services hosted on this web site. A number of windows services and desktop apps are working this with IIS instance. And everything is ok for some time. But some time later IIS begin to use 100% of cpu resources. I can suppose that my code is the probem, but firstly i'm doing next steps:
I'm switching off all windows services and desktop apps.
Switching off w3wp process from processes.
Restrating several times app pool, iis and site.
But after i'm startig again iis, pool and site and nothing else (nothing is using iis) i can see that iis worker process using about 20% of cpu resources. And the situation above can be repeated again after some time. It means that the problem can't be in the my code.
What can be the problem of the iis high-load then it just started and then it uses 100% of cpu?
It happens, we've all struggled with high CPU in a worker process before. It in almost all cases it is the code.
If you're threading (That's probably your answer right their)
But here's what you need to do.
Right click on the process consuming the CPU and click "Dump Process", this will create a debug file.
Then use debug diagnostic tool from Microsoft and open the file, it has a wealth of information in it. It's your starting point. Unless you're willing to share the code.
I am writing a web monitor app that gives information about all app pools / apps on my IIS server. I am looking for a way in C# to programmatically check if an IIS application is running without causing it to run if it is not.
Here is what I have found...
application is running, there are one or more sessions active.
all sessions dropped off...application still "running", app pool worker process is running.
At some point determined by IIS, the Application_End is finally executed...however, the app pool worker process is still running.
After 20 minutes, the app pool worker process finally shuts down due to inactivity.
It is between #3 and #4 that I am having trouble. The application has ended, but if I try to send an Http Request to the app, it will automatically start up. I am looking for a way to programmatically determine if the application has ended (while the worker process is still active awaiting shutdown) without restarting the Application.
I can try to provide more details if you are unsure what I am talking about.
Regards,
Jeremy
I found this on MSDN
public bool CheckIISRunning()
{
ServiceController controller = new ServiceController("W3SVC");
return controller.Status == ServiceControllerStatus.Running;
}
For this to work you need to have
System.ServiceProcess added as a reference.
Microsoft has created a VBScript file to identify the IIS Application Pools (by Process Id). If you search "iisapp.vbs" on google it should point you in the right direction.
Note: I'm not 100% sure that it will work with Windows Server 2008, but does work with 2003.
In IIS7 you can use appcmd apppool /? to see what possibilities are available.
I have windows task which restarts IIS at midnight 00:00. In my application there is a background thread which runs a global refresh at around 02:00.
My problem is that the application starts only on the first request from a browser. This may not occur for quite some time and the global refresh can be late in starting.
Is there any way to start the application without first browsing to the web application?
Ideally you should keep maintenance tasks such as this separate from your web application (either as a scheduled task or Windows service).
But, if you really need to do it this way could create a batch file that does:
iisreset /restart
"C:\Program Files\GnuWin32\bin\wget.exe" -O nul http://www.myapp.com/default.aspx
Then run this batch file as your scheduled task at 12:00. This will restart IIS and warm up your application.
You can get GNU wget.exe from:
WGET for Windows (SourceForge)
You can have another task that accesses your web site after IIS is restarted.
Still, I can't see why would you have a thread doing maintenance inside your IIS worker process. If the process dies from some reason (for example - because of the recycling configuration in the web site's application pool) the work won't get done. It's better to do this from a separate process, such as windows service or a scheduled windows task.
You shouldn't have any threads scheduled inside an IIS web application - becasue IIS has some logic to recycle the worker process and your application when it is not used. Its better to run it as a separate application (scheduled separately).
You could also use a Powershell script called by task manager. Here is simple six-line script we use to "warm up" SharePoint servers.
You could repurpose or find a similar script for a basic .NET application.