Application pool 'apppool' is being automatically disabled due to a series of failures in the process(es) serving that application pool.

Question

Application pools are automatically stopping after few seconds

Answer 1

Hi @Gundati, Sadaiah,

IIS comes with a feature called Rapid-Fail Protection. By default an AppPool is configured to become disabled if a worker in the pool crashes 5 times within a 5 minute span.

The thresholds of this setting are able to be modified by right clicking on the App Pool going to Advanced Settings and modifying the 'Rapid-Fail Protection' properties. However, this event indicates that there is likely a serious issue in your application that needs to be resolved.

Debug Diagnostics Tool (DebugDiag) can be a lifesaver. It creates and analyze IIS crash dumps. Maybe you can figured out the crash once checking the call stack.

Related document: IIS Application Pool Crash and Debug Diag.

But analyzing the dump file is a complex process, so I recommend you to open a support ticket via: https://support.microsoft.com, there will be professional technicians to assist you in grabbing the dump file and analyzing it.

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Best regards,

Yurong Dai