500 Internal Server Error access ServerWithStub for gRPC transcoding sample

[dashkan]

Version

5.0.0.CR7

Context

HTTP/1.1 500 Internal Server Error
When accessing grpc-examples/src/main/java/io/vertx/example/grpc/transcoding/ServerWithStub.java

Reproduced on macOS and ubuntu 24.04
Same behavior for following JDKs 17, 21, 24

No errors or output. ServerWithStub continues to run.

The standard Server version works just fine.

Steps to reproduce

1. run ServerWithStub from grpc-examples/src/main/java/io/vertx/example/grpc/transcoding
2. run Client from grpc-examples/src/main/java/io/vertx/example/grpc/transcoding
3. or curl -i -H "Content-Type: application/json" http://localhost:8080/v1/hello/test