Final Update: Saturday, 18 September 2021 03:51 UTC
We've confirmed that all systems are back to normal with no customer impact as of 09/18, 03:40 UTC. Our logs show that the incident started on 09/17, 19:45 UTC and that during the 7 hours & 55 minutes that it took to resolve the issue some of the customers experienced issues querying their data which can cause delayed or misfired alerts and web tests failures.
- Root Cause: The failure was due to unhealthy backend Traffic Manger probe.
- Incident Timeline: 7 Hours & 55 minutes - 09/17, 19:45 UTC through 09/18, 03:40 UTC
We understand that customers rely on Application Insights and Azure Log Analytics as a critical service and apologize for any impact this incident caused.
-Saika