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I have an issue with my ASP.NET app where it cannot access a specific endpoint. It throws a 502 error in Azure and a request timed out on my local machine. The endpoint I want to access is the products endpoint. I found that HttpContext.RequestAborted.IsCancellationRequested is set to true after passing through a certain middleware, which I can't identify since it is a built-in middleware and I cannot put a breakpoint on it. I noticed this because I have a custom middleware, and before calling the await _next(httpContext); method, IsCancellationRequested is set to false. However, after it is called, IsCancellationRequested is set to true, which I believe is the main reason for the error. Additionally, I discovered that I can access the products endpoint in incognito mode because IsCancellationRequested is always false whether before or after calling await _next(httpContext);, which is quite strange.
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Hi Alex, could you please share a minimal sample for reproducing the issue? Based on your description, I could only see an 502 error without any error message. I appreciate that you share your debug info and ideas about the issue, however, I don't know what your application is doing completely.
Here's the error message on azure.
On localhost, it was just a "localhost is currently unable to handle this request".
In addition to the above issue, there's a time that I can access the page in my local machine but not on azure.
Thank you Alex for your reply. I agree with Bruce and we might need more details about your application and other configurations on Server so that we could troubleshoot your issue.
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most likely the request is timing out. the timeout is what sets the cancellation token.