We've confirmed that all systems are back to normal with no customer impact as of 11/1, 23:36 UTC. Our logs show the incident started on 11/1, 20:15 UTC and that during the 3 hours, 21 minutes that it took to resolve some customers experienced latency in Log Search Alerts in East US, West Central US and East US 2.
Root Cause: The failure was due to a cache connection failure, which resulted in an internal denial of service event.
Incident Timeline: 3 Hours & 21 minutes - 11/1, 20:15 through 11/1, 23:36 UTC
We understand that customers rely on Log Search Alerts as a critical service and apologize for any impact this incident caused.
Initial Update: Friday, 01 November 2019 23:01 UTC
We are aware of issues within Log Search Alerts and are actively investigating. Some customers may experience latency in Log Search Alerts in the East US region.
Work Around: none at this time
Next Update: Before 11/02 00:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Jack Cantwell