A worker process was recycled.
Sample Event:
The worker processes serving application pool ''%1'' are being recycled due to 1 or more configuration changes in the application pool properties which necessitate a restart of the processes.
One or more properties changed, causing the application pool to be recycled.
This can be disabled in the metabase by setting DisallowRotationOnConfigChange. Note that setting this value will also tell the WWW Publishing Service not to recycle the worker processes in an application pool to pick up new configuration changes (like changed recycling settings).