We've confirmed that all systems are back to normal with no customer impact as of 08/22, 01:00 UTC. Our logs show the incident started on 08/21, 23:00 UTC and that during the 2 hours that it took to resolve the issue 15% of customers experienced intermittent data access issues.
Root Cause: The failure was due to an issue in one of our dependent platform services..
Incident Timeline: 2 Hours - 08/21, 23:00 UTC through 08/22, 01:00 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.