We've confirmed that all systems are back to normal with no customer impact as of 5/6, 20:15 UTC. Our logs show the incident started on 5/6, 15:20 UTC and that during the 5 hours that it took to resolve the issue customers experienced intermittent data access issues with Live Metrics.
Root Cause: The failure was due to particularly high usage tied to one of the back-end systems.
Incident Timeline: 4 Hours & 55 minutes - 5/6, 15:20 UTC through 5/6, 20:15 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Wednesday, 06 May 2020 19:52 UTC
We are aware of issues within Application Insights Live Metrics in the East US and are actively investigating. Some customers may experience intermittent issues accessing Live Metrics. The issue began at approximately 15:20 UTC on May 6, 2020.
Work Around: none at this time
Next Update: Before 05/06 21:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Jack