We're getting "HTTP Error 503. The service is unavailable.". Googling has provided lots of near hits, but none have worked so far.
The flow is: - confirm all app pools started - open browser to http://localhost, get 503 error - app pool is now stopped
The event log has 5 warnings of
"A listener channel for protocol 'http' in worker process 'nnnn' serving application pool 'DefaultAppPool' reported a listener channel failure. The data field contains the error number."
with the source WAS, details: ProtocolID: http FC2A0780 followed by 1 error
"Application pool 'DefaultAppPool' is being automatically disabled due to a series of failures in the process(es) serving that application pool."
Event ID 5002 Windows 2008 Enterprise, IIS7
All patches current as of 12/7/2011
Default Web Site, using DefaultAppPool
DefaultAppPool - tried Classic, Integrated modes, .NET 2 & 4, 32bit on and off, Identity of ApplicationPoolIdentity and an Administrator account, Ping enabled and not, Rapid-Fail enabled and not. Nothing in wwwroot except iisstart.htm, welcome.png and aspnet_client folder. Reinstalled IIS, .NET Framework.
Turning off Rapid-Fail simply resulted in never ending warnings and no logged error, but still got the 503 on the client.
The machine does not have RPC over HTTP or Sharepoint or Exchange installed, but does have SQL Server 2008 R2.
We've tried dozens of configurations, but all result in the same errors.