Application Insights alerts miss incomming exceptions

Question

Hello.
Newly incoming exceptions are not picked up by alerts in Application Insights.
In Investigate -> Failures -> Exceptions I do see an exception registered on 15.01.2021 shortly before noon

Yet existing alert is not triggered, and creating new alert for exceptions does not see this exception. I would expect to see that one exception when creating an alert, but it's empty.

Thanks in advance

Answer 1

@Vadim Slynko Thanks for reaching out. Please help with the following details:

• What is the resource type you are trying to monitor?
• What is the (KQL) log query backing the alert?
• Please also include a screenshot of the configured alert that isn't working as expected.

Meanwhile, here is how I was able to create and configure a working log alert from the Azure Portal for one of my Web apps to alert me when a specific type of exception occurs:

• Navigate to the Application insights resource on Azure Portal.
• Select Logs under the Monitoring blade.
• Construct your log query and check the results.
• Click on + New alert rule.
• Configure your alert as follows:

The above alert fires whenever the count of results in Custom log search log query for the last 1 day is greater than 0, and is evaluated every 6 hours. You can customize the Period and frequency as needed.

You can also run through this detailed guide for troubleshooting problems with Azure Monitor alerts. Please check if this helps.