Application pools don't restart

Hello,

We have developed a web services application that receives data continously. The web service runs within a custom application pool. The app pool is set to restart every 4000 requests. (although I have tried different settings) Sometimes the application pool restarts, sometimes it does not restart. Once I start up the app pool, everything runs ok again. I thought it might be "Rapid fail protection" but I am not getting any errors, so that rules that out. I was also thinking that it might be the "startup" and "shutdown" app pool time limits. Perhaps it's taking more than 90 seconds to shut down the app pool? I just changed that to see if it works. Our applicaton has worked at all of our customer sites except this one particular customer. I don't see anything in the IIS logs that help. I can't figure out why the darned app pool won't restart everytime.

I am not sure how else to debug this. Any ideas? Has anyone run into this?

Thanks!

Turns out, I am seeing "Connection_Abandoned_By_AppPool" errors in the HTTPError (IIS) logs followed by 503 errors. Not sure what causes that. But it appears that the "Rapid Fail Protection" is disabling the service and causing the 503 errors to be returned. But I am not sure what is causing "Connection_Abandoned_By_AppPool".

Hi
Have you ever tried with creating a new apppool and assigning the website to it.Try unchecking recycling apppool and review.In the performance tab is the Request Queue limited ? Uncheck and see.

Jeethu Joseph
IIS/Asp.Net Engineer Microsoft[/