Final Update: Friday, 20 September 2019 11:02 UTC
We've confirmed that all systems are back to normal with no customer impact as of 09/20, 07:30 UTC. Our logs show the incident started on 09/19, 19:30 UTC and that during the 12 hours that it took to resolve the issue a very small subset of customers could have experienced delays in receiving their availability test notifications.
- Root Cause: The failure was due to an issue in one of our dependent services.
- Incident Timeline: 12 Hours - 09/19, 19:30 UTC through 09/20, 07:30 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
-Varun