Error when use getJsonPayload method and Client.forward() over https

[josearivas]

Description

When I use the getJsonPayload method in a passthrough service (Client.forward()) and the backend service is exposed over HTTPS, I get the following error.

time=2024-10-21T08:21:40.885-04:00 level=ERROR module=ballerina/http message="unhandled error returned from the service" error={"causes":[],"message":"Bad Gateway","detail":{"statusCode":502,"headers":{"alt-svc":["h3=":443"; ma=2592000"],"content-length":["0"],"date":["Mon, 21 Oct 2024 12:21:40 GMT"],"server":["Caddy"],"x-http2-stream-id":["3"]},"body":()},"stackTrace":[{"callableName":"createResponseError","moduleName":"ballerina.http.2","fileName":"http_client_endpoint.bal","lineNumber":676},{"callableName":"processResponse","moduleName":"ballerina.http.2","fileName":"http_client_endpoint.bal","lineNumber":706},{"callableName":"processForward","moduleName":"ballerina.http.2.Client","fileName":"http_client_endpoint.bal","lineNumber":371}]} path="/api/proxy" method="POST"

The error does not occur when I use the getTextPayload method instead of getJsonPayload. And the error also does not occur when I use the getJsonPayload method and the endpoint backend is exposed via http.

Steps to Reproduce

1. Create the api

import ballerina/http;
import ballerina/io;

http:Client clientEP = check new ("https://micarro2.free.beeceptor.com");

service /api on new http:Listener(8080) {

    resource function post proxy(http:Request req) returns anydata|error {
        json payloadOrig = check req.getJsonPayload();
        io:println(payloadOrig);

        anydata response = check clientEP->forward("/proxy", req);
        return response;
    }
}

2. Run with bal run

Version

ballerina:2201.9.0

Environment Details (with versions)

Image ballerina/ballerina:2201.9.0
Docker version 20.10.12
WSL 2
Windows 11 Pro