Why .NET 7 Sample API get "error invoking app service-a: 500 Internal Server Error" use dapr

[LuBu0505]

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I Have create a very sample .net 7 API and use dapr run it in my local environment.

My API Code:

var builder = WebApplication.CreateBuilder(args);


var app = builder.Build();

app.MapGet("/Hello", () => "Hello World!");

app.MapGet("/GetServiceA", () =>
{
    //return new Data() { ID = 1, Name = "Service A", };
    return "This result from Service A";
});


app.Run();

and start this app by dapr run.
dapr run --app-id service-a --app-port 5001 dotnet run

After that, I saw this app already run.

PS C:\LBWorkSpace\MyCode\68-Dapr-Dotnet7\githubstartdemo\hello-world\node> dapr list
APP ID HTTP PORT GRPC PORT APP PORT COMMAND AGE CREATED DAPRD PID CLI PID APP PID RUN TEMPLATE PATH
nodeapp 3500 64657 3000 node app.js 21m 2023-04-02 12:16.29 23400 20488 18696
pythonapp 53800 53801 0 cmd /c python app.py 7m 2023-04-02 12:30.25 18648 17100 25128
service-a 56727 56728 5001 dotnet run 30s 2023-04-02 12:37.05 14996 8124 17064

But Why I can not invoke this method.

dapr invoke --app-id service-a --method Hello
dapr invoke --app-id service-a --method getservicea

Always get 500 error.

Cloud you please tell me why?

PS: I also used the quick starts dome -- "https://github.com/dapr/quickstarts/tree/v1.5.0/hello-world", It works. But for my Net 7 API. Not.

[LuBu0505]

attached the error screenshot.
https://github.com/LuBu0505/My-Code/blob/main/githubdapr.png?raw=true

[msfussell]

Maybe you just need to do this, with the GET verb
dapr invoke --app-id service-a --method Hello --verb GET
dapr invoke --app-id service-a --method GetServiceA --verb GET

Otherwise.
Have you checked the ports you are using?
Is some other app using port 5001?

[paulyuk]

@LuBu0505 thanks for report.

As @msfussell says this exact command works for me with your code adding --verb GET
dapr invoke --app-id order-processor --method Hello --verb GET

However, I believe you're missing an --app-protocol http flag on dapr run that tells the app to run on HTTP instead of gRPC -- could you please try this?
dapr run --app-id service-a --app-port 5001 --app-protocol http -- dotnet run

May I suggest you first try the Service Invocation Quickstart in entirety? That shows how to set the app-protocol and test. Then, I suggest copy in your MapGet functions, and try the dapr invoke with the --verb GET. That should resolve.

[msfussell]

@LuBu0505 - Any other update here? Did you try out the suggestions above ^ ^ ?

[vamanpnayak]

I am also facing similar issue. when try to do service invocation working.

I have two services one Client and one Server named. Attempted service invocation from Client app to Server app. used both DaprClientBuilder client and DaprClient.CreateInvokeHttpClient. Both cases I see internal server error when Client app attempting to POST request to Server app.

Dapr version : 1.12

Attempted to give a try via postman directly to dapr sidecar port. http://localhost:{{dpartPortServerApp}}/v1.0/invoke/order-processor/method/Order/Create and it is actually giving same internal server 500 error.

I could see the instances running in Dapr dashboard. Not sure how to get more insight on what's wrong.

Client : dapr run --app-id checkout --app-port 7200 --app-protocol http --dapr-http-port 3500 -- dotnet run
Server : dapr run --app-id order-processor --app-port 7201 --app-protocol http --dapr-http-port 3501 -- dotnet run

If I attempt directly to the Server controller route from Postman (as normal API). It works : http://localhost:7201/Order/Create but not via service invocation mechanism.

Also, I have also used Quickstart as it from the dapr docs. Only checkout app invokes but order-processing doesn't receive.
Checkout is getting internal server error when trying to invoke order-processing. (of course, that logic is not handled in quickstart app code. So it logs as order passed)

Any hints? if needed i can share the testapp.