We've confirmed that all systems are back to normal with no customer impact as of 08/25, 13:00 UTC. Our logs show the incident started on 08/25, 12:05 UTC and that during the 55 minutes that it took to resolve the issue some customers may have experienced alerting failures for Log alerts in China East 2 region.
Root Cause: The failure was due to issues in one of our back-end services.
Incident Timeline: 55 minutes - 08/25, 12:05 UTC through 08/25, 13:00 UTC
We understand that customers rely on Log Search Alerts as a critical service and apologize for any impact this incident caused.