We've confirmed that all systems are back to normal with no customer impact as of 10/02, 10:40 UTC. Our logs show the incident started on 10/02, 10:06 UTC and that during the 34 minutes that it took to resolve the issue some customers may have experienced data access and missed or delayed log search alerts in East US2 region.
Root Cause: The failure was due to one of our dependent service.
Incident Timeline: 34 minutes - 10/02, 10:06 UTC through 10/02, 10:40 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.