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Azure Application Gateway
An Azure service that provides a platform-managed, scalable, and highly available application delivery controller as a service.
1,000 questions
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@Mayank Jain , thank you for posting this question on Microsoft Q&A.
The 5XX errors are collected by default as Performance Metric for Application Gateway. You can access these using the "Metrics" resource menu in Application Gateway Resource. The Counter name corresponding to 5XX error is "Failed requests"
For more details about this metrics, please see Application Gateway metrics
You may also enable diagnostic logs to save this metrics in Log Analytics Workspace or Storage account for longer retention and analysis. For details, see Diagnostic Logs in Application Gateway.
Hope this helps.
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