Event ID - 1011

Event Id1011
DescriptionA process serving application pool %1 suffered a fatal communication error with the WWW service. The process ID was %2. The data field contains the error number.
Event InformationFrom a newsgroup post: 
"EventID 1011 is a generic error thrown by the World Wide Web Publishing Service when the IIS6 Application pool (w3wp.exe) crashes when an http request is being processed. Without mattering what the cause of the crash is, this error is logged. If you just cancel the w3wp.exe process from the task manager when a request is being process, this error will be logged.
It took us a while to find out what the cause of our crash was. In our case, the problem was that our application was using a very old Sybase ODBC driver, which was not supported on the .NET platform. This driver usually worked fine, but occasionally, in a random manner, caused this crash. We updated this driver for a valid one, and the problem was solved. We contacted Microsoft support and installed the IIS Debug tools. The IIS memory dump we got led us to the ODBC problem.
The thing is that EventID 1011 is so generic, that in other cases, the problem might be literally anything".
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