Application pool stops randomly within in a specified time period: automatically disabled due to a series of failures

Symptoms

• Application pool stops randomly within a specified time period.
• The following error can be found in Event Viewer.

Cause

Rapid-Fail Protection disables application pool if it crashes several times within a specified time period.

Solution

NRapid-Fail Protection prevents the failing application pool from getting into a continuous loop of crashing. This is useful when an application goes out of control which could overload the server.
In general, it is better to review the application code to resolve crashes.

To prevent an Application Pool from stopping, disable Rapid Fail Protection in IIS. Refer to this article for more information: