For databases utilizing Availability Groups. Used internally while Windows Failover Clustering is waiting for the notification task to shutdown. This wait is uncommon, investigation is required if the values are excessive.
- Examine Windows Failover Clustering logs for any issues
- Check the SQL Server error log for more information
- Examine wait statistics on the instance for other Availability Group issues. Investigate accordingly
AlwaysOn Availability Groups Troubleshooting and Monitoring Guide