We've confirmed that all systems are back to normal with no customer impact as of 6/1, 16:56 UTC. Our logs show the incident started on 6/1, 13:30 UTC and that during the 3 hours and 26 minutes that it took to resolve the issue customers experienced Query and alerting failures.
Root Cause: The failure was due to a backend service that became unresponsive.
Incident Timeline: 3 Hours & 26 minutes - 6/1, 13:30 UTC through 6/1, 16:56 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Monday, 01 June 2020 16:38 UTC
We are aware of issues within Application Insights and Log Analytics and are actively investigating. Some customers may experience Data Access issues in East US, West EU, and Central US regions.
Work Around: None
Next Update: Before 06/01 19:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Jeff