Final Update: Thursday, 09 December 2021 02:43 UTCSummary of impact: Between 20:24 UTC 08 Dec 2021 and 04:24 UTC 08 Dec 2021, customers using Azure Monitor may have experienced failures when attempting to see metrics. About 20% of the queries retrieving data for Azure App Services and Azure Functions may have failed. Retries may be successful.
Preliminary Root Cause: We determined that a recent upgrade to the compute tenant caused a backend component turn unhealthy leading to the query failures.
Mitigation: We throttled the query load, which brought the backend component to a healthy state to prevent further query failures and as result mitigated the issue.
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.-Jack Cantwell Update: Thursday, 09 December 2021 00:31 UTC
The team is still working on mitigating the issues, but customers may continue to experience failures when attempting to see metrics for Azure App Services and Azure Functions.
- Work Around: None
- Next Update: Before 12/09 02:00 UTC
-Jack Cantwell
Update: Wednesday, 08 December 2021 22:34 UTC
Starting at 20:24 UTC 08 Dec 2021, users of Azure Monitor who may have experienced failures when attempting to see metrics for Azure App Services and Azure Functions. About 20% of the queries retrieving data for Azure App Services and Azure Functions may have failed.
- Work Around: none
- Next Update: Before 12/09 00:00 UTC
-Jack Cantwell