We've confirmed that all systems are back to normal with no customer impact as of 8/18, 00:10 UTC. Our logs show the incident started on 8/17, 20:30 UTC and that during the 3 hours and 40 minutes that it took to resolve the issue 5,873 subscriptions experienced intermittent data latency, data gaps and incorrect alert activation.
Root Cause: The failure was due to a dependent backend component reaching an operational threshold. A manual scaling of the resource was performed to mitigate the issue.
Incident Timeline: 3 Hours & 40 minutes - 8/17, 20:30 UTC through 8/18, 00:10 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Monday, 17 August 2020 22:28 UTC
We are aware of issues within Application Insights in the East US 2 region and are actively investigating. Some customers may experience Data Latency.
Work Around: None
Next Update: Before 08/18 00:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Jeff