We've confirmed that all systems are back to normal with no customer impact as of 09/13, 18:03 UTC. Our logs show the incident started on 09/13, 16:55 UTC and that during the 1 hour and 8 minutes that it took to resolve the issue 31% of customers experienced issue with data access and alerting for workspaces in West US2 region.
Root Cause: The failure was due to one of the backend dependent service .
Incident Timeline: 1 Hours & 8 minutes - 09/13, 16:55 UTC through 09/13, 18:03 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
Initial Update: Friday, 13 September 2019 17:56 UTC
We are aware of issues within Log Analytics and are actively investigating. Some customers may experience issue with data access and alerting for workspaces in West US2 region.
Next Update: Before 09/13 22:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Jayadev