Error 500 after 5 minutes of test loading my wiremock service

[eetawil]

Hi,

Question, I've setup a wiremock (version 1.5.49) running in a Azure webApp. When I try to do a loadtest on it (the wiremock in this is case is simply proxing the call to the real server)

 _server.Given(Request.Create().WithPath("/*"))
        .RespondWith(Response.Create()
            .WithProxy(realServiceURL));

My load test pings my url every ~3 seconds and It runs fine for 5 minutes (getting 200), then suddenly starts to get 500 and i'm not sure why...here's a log right when the error happens...

My wiremock setup is very vanilla no settings defined. Could it be due to a setting or something like that since it really happens starting about 5 minutes into the test and i'm able to repeat that a few times. CPU and RAM are fine also.

In the below image, i'm showing that all is good (green 200) then suddenly you see red (500)

Could it be related to a setting such as :
RequestLogExpirationDuration
MaxRequestLogCount

Or have you ever seen something like that before?

025-03-25 19:21:18.176 +00:00 [Information] Microsoft.AspNetCore.Hosting.Diagnostics: Request finished HTTP/1.1 GET http://XXXX.azurewebsites.net/ - - - 200 - text/plain;+charset=ISO-8859-1 3.7548ms
2025-03-25 19:21:29.853 +00:00 [Information] Microsoft.AspNetCore.Hosting.Diagnostics: Request starting HTTP/1.1 POST http://XXXX.azurewebsites.net/flattenPdf multipart/form-data;+boundary=cb6bfeca461dabcc8cdee34a3cecc547 4994447
2025-03-25 19:21:29.859 +00:00 [Debug] Microsoft.AspNetCore.Server.Kestrel: Connection id "0HNB9OE1ASM8O", Request id "0HNB9OE1ASM8O:00000005": started reading request body.
2025-03-25 19:21:31.331 +00:00 [Debug] Microsoft.AspNetCore.Server.Kestrel.Connections: Connection id "0HNB9OE1ASM8O" completed keep alive response.
2025-03-25 19:21:31.331 +00:00 [Information] Microsoft.AspNetCore.Hosting.Diagnostics: Request finished HTTP/1.1 POST http://XXXX.azurewebsites.net/flattenPdf multipart/form-data;+boundary=cb6bfeca461dabcc8cdee34a3cecc547 4994447 - 500 - application/json 1478.2614ms
2025-03-25 19:21:31.331 +00:00 [Information] Microsoft.AspNetCore.Server.Kestrel: Connection id "0HNB9OE1ASM8O", Request id "0HNB9OE1ASM8O:00000005": the application completed without reading the entire request body.
2025-03-25 19:21:31.382 +00:00 [Debug] Microsoft.AspNetCore.Server.Kestrel: Connection id "0HNB9OE1ASM8O", Request id "0HNB9OE1ASM8O:00000005": done reading request body.<.....Typical IIS 500 Error message ...>

If I do the same test on the real URL directly withhout passing through the wirmock proxy it works without ever getting 500, so I know it's not that the problem but rather something either with the WebApp or with wiremock settings.

[eetawil]

After setting the WireMockServerSettings
"RequestLogExpirationDuration": 2,
"MaxRequestLogCount": 2,

to low values I no longer have 500 error