We've confirmed that all systems are back to normal with no customer impact as of 03/15, 08:45 UTC. Our logs show the incident started on 03/15, 08:30 UTC and that during 15 mins that it took to resolve the issue 0.3% request failing for the customers in West US region while sending telemetry data to our ingestion services
Root Cause: The failure was due to backend service entering in to an unhealthy state.
Incident Timeline: 15 minutes - 03/15, 08:30 UTC through 03/15, 08:45 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.