Reflection: Cannot reflect service that imports from another file: `file ... included an unresolvable reference`

[robrichard]

Problem description

I am not able to use reflection after setting up @grpc/reflection. Attempting to reflect any service that imports a message from another file gives an error similar to

Error invoking method "hello_world.HelloWorldService/helloWorld": failed to query for service descriptor "hello_world.HelloWorldService": file "hello_world.proto" included an unresolvable reference to ".hello_world.hello_world_service.HelloWorldRequest"

Reproduction steps

Example repo demonstrating the issue: https://github.com/robrichard/grpc-reflection-test
Exact reproduction steps are in the README.md of that repo.

Environment

• macOs Sequoia 15.6
• Node version v20.11.1
• Package name and version:
  • @grpc/grpc-js: 1.14.0,
  • @grpc/proto-loader: 0.8.0
  • @grpc/reflection: 1.0.4