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Application pool not recycling

Posted on 2004-09-09
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Last Modified: 2010-05-18
Hi

i have a website on my server that consules lots of ressources
so i set an application pool for it and configured the process to recycle each 3 hours (Recycle worker processes at the following times...)

It worked ok the first 2 days but stoped suddenly
the worker process does not recycle at the specified time, and the site goes down (i need to kill the process manually so that site goes online again)

I wen to event viewer to take a look on the problem
i saw the message application 'pati' has requested a recycle , bla bla bla, the usual message.

But it seems that worker process did not recycle because the site is still down

So i checked the 2 options in
Recycle worker process after consuming too much memory
Maximum virtual memory : 500

Maximum used memory : 192

It work better but we are not globally satisfied because somtimes the worker process does not recycle and the site goes dow again.

Does anyone has a solution for this problem ?
thx

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Question by:humer2000
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LVL 34

Expert Comment

by:Dave_Dietz
ID: 12036902
The most likely reason the Application Pool isn't recycling is that you have one or more hung threads in the web application.

When the App Pool requests a recyvle the OS waits for the App Pool to drain all of its connections and terminate its threads.  If it can't do this the App Pol will not recycle.

You'll need to figure out what is hanging in the applciation to resolve this issue.

Dave Dietz
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Author Comment

by:humer2000
ID: 12037561
if i run the web application in IIS 5 isolation mode
would this resolve my problem ?
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LVL 34

Expert Comment

by:Dave_Dietz
ID: 12038575
No.

The issue is not related to the IIS 6.0 process model.  If you change to IIS 5.0 compatibility mode you will still have problems - potentially worse.

Dave Dietz
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Author Comment

by:humer2000
ID: 12038827
their must be a way to force the app pool to kill all threads if it requests a recycle !
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Author Comment

by:humer2000
ID: 12888117
i found the solution
here is an app that helped resolving my problem

http://www.motobit.com/help/webcheck/library.htm
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