We've confirmed that all systems are back to normal with no customer impact as of 11/19, 19:00 UTC. Our logs show the incident started on 11/19, 15:00 UTC and that during the 4 hours that it took to resolve the issue 10% of customers might have experienced data access issues in East US,West Europe and Southeast Asia in Azure and OMS Portal for Log Analytics.
Root Cause: The failure was due to failure in one of our dependent services
Incident Timeline: 4 Hours - 11/19, 15:00 UTC through 11/19, 19:00 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
Initial Update: Monday, 19 November 2018 19:47 UTC
We are aware of issues within Application Insights and Log Analytics and are actively investigating. Some customers may experience data access issues in portal.
Next Update: Before 11/19 23:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience.