Final Update: Thursday, 12 November 2020 02:14 UTC
We've confirmed that all systems are back to normal with no customer impact as of 11/12, 01:20 UTC. Our logs show that the incident started on 11/11, 23:50 UTC and that during the 1 hour and 30 minutes that it took to resolve the issue some of the customers experienced issues with missed or delayed Log Search Alerts or experienced difficulties accessing data for resources hosted in West US2 and North Europe.
Root Cause: The failure was due to an issue in one of our backend service.
Incident Timeline: 1 Hour & 30 minutes - 11/11, 23:50 UTC through 11/12, 1:20 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
Initial Update: Thursday, 12 November 2020 01:35 UTC
We are aware of issues within Log Analytics and are actively investigating. Some customers may experience issues with missed, delayed or wrongly fired alerts or experience difficulties accessing data for resources hosted in West US2 and North Europe.
Work Around: None
Next Update: Before 11/12 06:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Saika