We've confirmed that all systems are back to normal with no customer impact as of 8/7, 11:00 UTC. Our logs show the incident started on 8/6, 10:00 UTC and that during the 21 hours that it took to resolve the issue, ~91 customers (~ .013%) experienced issues while trying to create web test alerts using the ARM template.
Root Cause: The failure was due to a deployment of
CDS that introduced a concurrency issue which resulted in failures for certain ARM
deployments of web tests.
Incident Timeline: 21 Hours - 8/6, 10:00 UTC through 8/7, 11:00 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Wednesday, 07 August 2019 15:46 UTC
We are aware of issues within Application Insights and are actively investigating. Some customers may face issues while trying to create web test alerts using the ARM template.
Work Around: None
Next Update: Before 08/07 19:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Varun