We've confirmed that all systems are back to normal with no customer impact as of 04/27, 02:10 UTC. Our logs show the incident started on 04/27, 01:46 UTC and that during the 24 minutes that it took to resolve the issue 5% of customers experienced data access issues and delayed or missed alerts in South East Australia.
Root Cause: Engineers determined that backend storage device became unhealthy.
Mitigation: Engineers determined that the service is auto recovered by Azure platform.
Incident Timeline: 24 minutes - 04/27, 01:46 UTC through 04/27, 02:10 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.