18 Jul 2012
18 May 2009
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I experienced this exact issue recently, nearly lost my mind trying to identify it! we upgraded our sitefinity to the latest 3.6sp1 hotfix (from just the sp1) and suddenly whenever we modified web.config or restarted the application it would hang for up to like 10 minutes! (before, app start times maxed out at maybe 10 seconds)
it wouldn't time out, it would eventually load, and after that all further requests were immediate, until the app restarted again, taking another 10-15 minutes... very strange but at the same time, infuriating.
unfortunately, I never figured out WHY it happened...
however, the problem did go away after reapplying the hotfix. we just downloaded the patch and copied everything over again, making sure to include all changes in web.config, app.browsers, etc...
which is what we did the first time, but for whatever reason, after doing this, it now works as normal!
I don't know if this applies to you, but I hope this was helpful...