We've confirmed that all systems are back to normal with no customer impact as of 10/24, 10:26 UTC. Our logs show the incident started on 10/24, 06:26 UTC and that during the 4 hours that it took to resolve the issue ~10% of customers from West Europe region may have experienced failures while performing log search operations and possible missed alerts for resources hosted in this region.
Root Cause: The failure was due to issue with one of our dependent service.
Incident Timeline: 4 Hours - 10/24, 06:26 UTC through 10/24, 10:26 UTC
We understand that customers rely on Log Search Alerts as a critical service and apologize for any impact this incident caused.
Initial Update: Thursday, 24 October 2019 07:40 UTC
We are aware of issues within Log Search Alerts and are actively investigating. Some customers may experience alerting failure in West Europe region.
Work Around: None
Next Update: Before 10/24 11:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Rama