CODEWITHSUNDEEP
asp.net-coreazure-web-app-servicehttp-status-code-502
amsDeveloper
amsDeveloper

Reputation: 337

The CGI application did not return a valid set of HTTP errors. 502.3 - Bad Gateway: Forwarder Connection Error (ARR) on Azure ASP.NET Core App

All of a sudden we are seeing this random error / exception in our web application.

Failed to load resource: the server responded with a status of 502 (Bad Gateway).

In the Log Stream, we are seeing the following details, with specific error code as 502.3 - Bad Gateway: Forwarder Connection Error (ARR).

Also, sometimes in the browser itself we see "The CGI application did not return a valid set of HTTP errors." getting displayed.

Most of the searches for these error codes refer to "IIS / Proxy Server" configuration. But, we haven't changed any such settings.

The error happens very randomly and not specific to any user action/function. Same functionality works first and on second execution immediately after first one throws this error.

How to figure out what is causing this and how to fix?

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Upvotes: 1

Views: 10760

Answers (1)

Jason Pan
Jason Pan

Reputation: 22082

I google this question, because the program was normal at the beginning, and the subsequent 502.3 error. After I checked the information on the Internet, I feel that it can only give us an inspiration, and it cannot solve your problem immediately.

So my suggestion is that first you browse post1 and post2 I provided.

Next, proceed to Troubleshoot according to the steps of the official documentation. Specific errors require specific analysis.

Upvotes: 0

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