We've confirmed that all systems are back to normal with no customer impact as of 3/15, 02:15 UTC. Our logs show the incident started on 3/15, 00:00 UTC and that during the two hours and 15 minutes that it took to resolve the issue approximately 10,000 customers experienced delayed telemetry ingestion.
Root Cause: The failure was due to a failure in a back end service that Application Insights relies on.
Incident Timeline: 2 Hours & 15 minutes - 3/15, 00:00 UTC through 3/15, 02:15 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Monday, 15 March 2021 01:15 UTC
We are aware of issues within Application Insights in the East US region and are actively investigating. Some customers may experience data ingestion latency.
Next Update: Before 03/15 02:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Jack