System.ArgumentException: Invalid destination prefix.

[cristyonathan]

can someone explain about this error??
System.ArgumentException: Invalid destination prefix. (Parameter 'destinationPrefix') at Yarp.ReverseProxy.Forwarder.HttpForwarder.CreateRequestMessageAsync(HttpContext context, String destinationPrefix, HttpTransformer transformer, ForwarderRequestConfig requestConfig, Boolean isStreamingRequest, ActivityCancellationTokenSource activityToken) at Yarp.ReverseProxy.Forwarder.HttpForwarder.SendAsync(HttpContext context, String destinationPrefix, HttpMessageInvoker httpClient, ForwarderRequestConfig requestConfig, HttpTransformer transformer) at Yarp.ReverseProxy.Forwarder.ForwarderMiddleware.Invoke(HttpContext context) at Yarp.ReverseProxy.Health.PassiveHealthCheckMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

this error, happens when i hit the api with reverse proxy

[MihaZupan]

What does your config look like?
destinationPrefix is taken from your Destination's Address and we only do minimal validation.

https://github.com/microsoft/reverse-proxy/blob/96ed54fd0286638838edb1543333a00dbb3c595b/src/ReverseProxy/Forwarder/HttpForwarder.cs#L260

Seeing this exception means the prefix was shorter than 8 characters, meaning it couldn't possibly be a start of an Absolute Url.

[cristyonathan]

thanks, its really help me to trace my problem