We've confirmed that all systems are back to normal with no customer impact as of 11/18, 14:50 UTC. Our logs show the incident started on 11/18, 14:20 UTC and that during the 30 minutes that it took to resolve the issue customer using Log Analytics or Service Map may have experienced failures and timeouts while accessing workspaces and may also have experienced data latency in West Europe region.
Root Cause: The failure was due to issue with one of our backend service.
Incident Timeline: 30 minutes - 11/18, 14:20 UTC through 11/18, 14:50 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.