I have multiple applications under the "Default Web Site" pool. I can restart the entire pool from IIS Manage Website options but I have many applications under that which I don't want restarted.
How can I restart just the one because we cannot see the options to do so under each application.
IIS does not provide an option to restart the single app in the app pool. So from the IIS user interface it will not be possible to restart the single app.
You could try to test the workaround suggested by Lex Li may work for you.
I have main website hosted in my IIS and under that I have multiple applications (another web apps) that run on a separate application pool. I know that if you will change some files of site that is hosted in IIS it will result into application pool recycling. However I am not sure what will happen in my scenario, from one hand they have different app pools, but from another hand application is hosted under main website.
Is it possible to deploy application that is hosted under web site without disrupting main site operation?
Thanks in advance.
No it wont. If you have your main site and applications running under different application pool, you should be fine.
Application Domains and application pool ensure isolation with respect to applications on IIS. Changes made to application will cause specific application domain to refresh and will not have an impact on other applications.
I was recently cleaning up my file system and observed that there were few users, which I never created directly, in the c:\users* directory. This is supposed to have all those users which was created/logged in on local machines. I observed that these usernames are same as the name of Application Pools I have created in the IIS.
To confirm I created a new Application Pool in IIS and then observed this directory. Still it was not there. Later I created a new web site, assigned this application pool and accessed that website from browser, and then I see a new user profile with the name of the new application pool.
Question is - Why does it create a user profile for every IIS Application Pool? Is it absolutely necessary to have, and can it be configured for not creating? Will there be any downside? I do not remember to have seen this in earlier IIS i.e. 6.0.
My environment - Windows 7 64 Bit, IIS 7.5
I tried to google, but most links tell me how to configure User/Identity with app pool and stuff, but nothing specific about these questions.
This behaviour is because of the new security model starting with IIS 7.
Application Pool Identities started with IIS 7
Application Pool Identities allow you to run Application Pools under a unique account without having to create and manage domain or local accounts. The name of the Application Pool account corresponds to the name of the Application Pool.
- Application Pool Identities (2009)
The main reason is security, each application pool is isolated from each other.
LoadUserProfile=true Creates the User Profile Folder
From experimenting on my machine I believe this setting is responsible for the folders being created.
Having LoadUserProfile set to true means that IIS will load the user profile for the application pool identity. This happens when the application is actually spun up, you can test this by creating a new app pool and if the setting is false, no new folders should be created under C:\Users when you hit the web site for the first time.
- IIS Documentation
According to the documentation LoadUserProfile should be false by default, although I have noticed that on Win 7 machines it might be set to true instead. You can change this default via the IIS gui:
I have created a WCF service which i have hosted in IIS. When I start the service in IIS, the Service do not started until I browse my Service.svc file.
Application pool gets recycled after a specific interval, then when the Service is restarted I again need to go and browse the Service.svc file.
I have set this Service as Default bt it does not work and results the same.
Is there any way to automatic browse my Service.svc file when the Service is started or restarted.
This is a general annoyance with IIS. It launches worker processes to perform website processing which don't (always) start until the website has been requested. The workaround I've used in the past is to hit a page outside of my web application to launch the IIS worker process so it is available when I need it. Be careful though there are some nuances to the app pools that can make this more complicated than it needs to be.
I have a problem with timeouts in IIS. In the web.config the session timeout was set to 60 minutes but after 20 minutes the session ends.
This problem only occurs in IIS7 and not in IIS5.
After some investigation, I discovered it was due to the application pool's timeout. If the App Pool is left 20 minutes without doing anything, IIS ends the session.
If the application is using the defaultAppPool this always happens but if I change the App Pool to the classic .NET App Pool, the timeout does not occur.
Both modes have idle timeout but only in the DefaultAppPool this occurs.
Why is this?
What is the difference between be a Classic .NET AppPool and DefaultAppPool?
What is the difference in the pipeline, between Classic and Integrated?
IIS7 has some major changes to better support WCF and one of the key pieces is the new integrated application pool. This session from PDC talks about some of these challenges from the perspective of making WCF services perform better: http://channel9.msdn.com/pdc2008/TL38/
This page has a good overview of IIS7 architecture: http://learn.iis.net/page.aspx/101/introduction-to-iis7-architecture/.
I've included some of the key information from this article on the purpose of the two different kinds of app pools below:
Integrated application pool mode
When an application pool is in
Integrated mode, you can take
advantage of the integrated
request-processing architecture of IIS
and ASP.NET. When a worker process in
an application pool receives a
request, the request passes through an
ordered list of events. Each event
calls the necessary native and managed
modules to process portions of the
request and to generate the response.
There are several benefits to running
application pools in Integrated mode.
First the request-processing models of
IIS and ASP.NET are integrated into a
unified process model. This model
eliminates steps that were previously
duplicated in IIS and ASP.NET, such as
authentication. Additionally,
Integrated mode enables the
availability of managed features to
all content types.
Classic application pool mode
When an application pool is in Classic
mode, IIS 7.0 handles requests as in
IIS 6.0 worker process isolation mode.
ASP.NET requests first go through
native processing steps in IIS and are
then routed to Aspnet_isapi.dll for
processing of managed code in the
managed runtime. Finally, the request
is routed back through IIS to send the
response. This separation of the IIS
and ASP.NET request-processing models
results in duplication of some
processing steps, such as
authentication and authorization.
Additionally, managed code features,
such as forms authentication, are only
available to ASP.NET applications or
applications for which you have script
mapped all requests to be handled by
aspnet_isapi.dll. Be sure to test your
existing applications for
compatibility in Integrated mode
before upgrading a production
environment to IIS 7.0 and assigning
applications to application pools in
Integrated mode. You should only add
an application to an application pool
in Classic mode if the application
fails to work in Integrated mode. For
example, your application might rely
on an authentication token passed from
IIS to the managed runtime, and, due
to the new architecture in IIS 7.0,
the process breaks your application.
The classic pool processes the requests in the app pool by using seperate processing pipelinesfor IIS and ISAPI. integrated uses an integrated pipeline, IIS and ASP.NET a(better performance) takes advantage of the improved features of IIS 7.0 using only the one process.
Good practise is to create a new application pool for each application, then configure sepeerately according to application requirements.
Classic mode follows the steps below :
1.The incoming HTTP request is received through the IIS core.
2.The request is processed through ISAPI.
3.The request is processed through ASP.NET.
4.The request passes back through ISAPI.
5.The request passes back through the IIS core where the HTTP response finally is delivered
Integrated mode uses:
1.The incoming HTTP request is received through the IIS core and ASP.NET.
2.The appropriate handler executes the request and delivers the HTTP response
Increase the session timeout in web.config as per
remember increasing this causes the application to consume more resource, eg memory
I think your question has the answer in it. IIS 6 and 7 have a concept of Application Pool timeout, this is different from session timeout.
What is the difference between modes ... already addressed. I'm uncertain about how your questions regarding pipelines and differences in modes relate to your problem - the timeouts.
Some perspective: Idle timeout won't occur on a web site with any traffic. You've probably got a problem that only occurs in a QA site or your dev box. The idle timeout setting exists to save resources on your dev box and $5/month hosting companies with lots of underused web sites (e.g. my blog). You probably do not want idle timeout on a public site.
Session timeout - set in web config, if a user doesn't hit the server, their session times out.
Idle timeout Noone touches the web server at all for 20 minutes, so shut down to save resources. In IIS 6, this is on the performance tab of the app pool - and is easy to disable. In IIS 7, you can set in in application pool advanced settings or in the processModel element. I don't run as much IIS 7 as IIS 6, but it looks like removing the element from web.config, or setting to 0, gets infinite idle timeout.
The DefaultAppPool ignores settings for session timeout in web.config, but ASPNet App Pool will use the settings in web.config.