Final Update: Friday, 20 May 2022 14:43 UTC
We've confirmed that all systems are back to normal with no customer impact as of 05/20, 14:20 UTC. Our logs show the incident started on 05/20, 09:45 UTC and that during the 4 hours and 35 minutes that it took to resolve the issue. Some customers using the Log Analytics service may have experienced latency and/or failures when attempting to carry out data plane and control plane operations in West US 2 region. Additionally, customers using Service Map, Log Search Alerts and Azure Automation may have experienced latency and/or failures during impacted time.
- Root Cause: An increase in load exposed a un optimized flow in one of the backend service which caused the service to reach the operational threshold that led to the errors mentioned above.
- Incident Timeline: 4 Hours & 35 minutes - 05/20, 09:45 UTC through 05/20, 14:20 UTC.
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
-Anmol
