Experiencing failure in alert creation or updation for Classic alerts - 12/18 - Resolved

[Azure-Monitor-Team]

Final Update: Wednesday, 18 December 2019 17:26 UTC

We've confirmed that all systems are back to normal with no customer impact as of 12/18, 16:40 UTC. Our logs show the incident started on 12/17, 17:00 UTC and that during the 23 hours 40 mins that it took to resolve the issue 90% of customers in South Central US may have received failure notifications when performing service management operations - such as create, update, delete and read for classic metric alerts hosted in this region.

• Root Cause: Engineers determined that a recent configuration change caused a backend service in charge of processing service requests to become unhealthy, preventing requests from completing.. 
• Mitigation: Engineers performed a change to the service configuration to mitigate the issue.
  
• Incident Timeline: 23 Hours & 40 minutes - 12/17, 17:00 UTC through 12/18, 16:40 UTC

We understand that customers rely on Azure Monitor as a critical service and apologize for any impact this incident caused.

-Leela

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Initial Update: Wednesday, 18 December 2019 16:05 UTC

We are aware of issues within Classic Alerts and are actively investigating. Some customers in South Central US may experience failure in updation or creation of new alerts.

• Work Around: None 
• Next Update: Before 12/18 18:30 UTC

We are working hard to resolve this issue and apologize for any inconvenience.
-Madhuri

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