We've confirmed that all systems are back to normal with no customer impact as of 08/26, 08:22 UTC. Our logs show the incident started on 08/26, 06:15 UTC and that during the 2 hours and 07 minutes that it took to resolve the issue some customers may have experienced intermittent data gaps and incorrect alert activation in West Europe region.
Root Cause: We identified that a recent deployment that introduced an change to a backend service output configuration, which was causing requests to throttle resulting in data failures.
Incident Timeline: 2 Hours & 07 minutes - 08/26, 06:15 UTC through 08/26, 08:22 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Thursday, 26 August 2021 07:10 UTC
We are aware of issues within Application Insights and are actively investigating. Some customers may experience intermittent data gaps and incorrect alert activation in West Europe region.
Work Around: None
Next Update: Before 08/26 09:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Anmol