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app pool not starting Exchange 2010

I am having an issue where my OWA is not connecting unless I restart the IIS every so often, and the "msexchangeautodiscoverappPool will not start and when I try I get the attached error. I also noticed the errors in event viewer are 5189 and 5203 both pertaining to the app pool. Any assistance would be greatly appreciated.
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Dan McFadden
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You forgot the attachment...

Dan
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Sorry about that
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I would verify the permissions on the applicationHost.config file.

The permissions should be:

Owner: SYSTEM
Allow TrustedInstaller Full control
Allow SYSTEM Full control
Allow Administrators (YourServer\Administrators) Full control
Allow --- probably your account too.  Full

These permissions are normally inherited from the C:\windows\system32\inetsrv\config directory

Dan
Could this all be because of file system structure being corrupt or unusable on a virtual disk? The permissions are good, this server has been running for years and boom all of a sudden nothing.
Its possible that file system corruption could cause issues.  I'm not sure if a physical or virtual disk makes a difference... I would probably say it wouldn't make a difference.

You could run a chkdsk without the fix switch, just to see if it reports problems.

Dan
Just a shot in the dark... is the applicationHost.config file marked as Read-Only?  Check the properties of the file and look at the attributes.

Dan
No the applicationhost.config is NOT marked as read only
The app pools all seem to be started, but the Microsoft transport service will not start and I have an error in event viewer saying file system structure on dis is corrupt and unusable. Could this be the cause of all these problems?
I believe it could be at the least part of the issue.

You'll probably need to run a Resource Checker scan.... the "sfc" utility to verify the OS files.

From an Administrator command prompt
sfc /scannow

Open in new window


Then a chkdsk as well.

Dan
Got transport service on, now says databases are corrupt and they will not mount.
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Dan McFadden
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Thank you for your help, repairing the databases fixed the issue.