My Azure dev environment always redirects me to an error page

Question

I have an MVC project running locally, and I set-up CI/CD pipelines for it. The issue I am having is that when I go on the server, it always redirects me to an error page. Here is what I am seeing on my end:

and the URL always adds a aspxerrorpath parameter:

I have custom error pages in place, and here is how my web.config file has them:

<customErrors mode="On">
    <error statusCode="404" redirect="~/Error/NotFoundError"/>
    <error statusCode="500" redirect="~/Error/InternalServerError"/>
</customErrors>

and here is my error controller:

public ActionResult NotFoundError()
  {
    return View("~/Views/Shared/CustomErrors/_Error404.cshtml");
  }

public ActionResult InternalServerError()
  {
    return View("~/Views/Shared/CustomErrors/_Error500.cshtml");
  }

Now, this runs fine locally; however, it breaks on the Azure environment. Even when I manually change the url, it gives the error on all the pages I navigate to. The pages show as found in the network tab,302, but I still get this error. I have tried the following to fix it but still got the same result:

public ActionResult NotFoundError(string aspxerrorpath)
 {
   if (!string.IsNullOrWhiteSpace(aspxerrorpath))
      return RedirectToAction("~/Views/Shared/CustomErrors/_Error404.cshtml");

   return View("~/Views/Shared/CustomErrors/_Error404.cshtml");
 }

public ActionResult InternalServerError(string aspxerrorpath)
 {
   if (!string.IsNullOrWhiteSpace(aspxerrorpath))
      return RedirectToAction("~/Views/Shared/CustomErrors/_Error404.cshtml");

   return View("~/Views/Shared/CustomErrors/_Error500.cshtml");
  }

Can someone shed some light on what is going on? How can I fix this error?

If you need further help, pls let me know. – Jason Pan Nov 18 '20 at 01:52 — Jason Pan, Nov 18 '20 at 01:52

score 0 · Accepted Answer · answered Nov 19 '20 at 01:38

The issue was that the connectionString password was changing when it gets deployed on my Azure AppService. I needed to add the AutoParameterizationWebConfigConnectionStrings in my MSBuild Arguments in the build step and set it to false so that it won't tokenize

My Azure dev environment always redirects me to an error page

1 Answers1