I get gRPC client is missing configuration even though the configuration is set

[LarsSven]

I have a Quarkus service that has a gRPC client. The Quarkus application does not set the host/port of the gRPC client in the application.yml/properties, as this needs to be set at deployment. So I spin up a container that hosts this Quarkus app, where I set the following environment variables on the container:

QUARKUS_GRPC_CLIENTS__RUNTIME_REPORTER__HOST: "runtime-reporter"
QUARKUS_GRPC_CLIENTS__RUNTIME_REPORTER__PORT: "9081"

But I still get this during startup:

2025-11-04 14:16:43,599 INFO [io.qua.dev.dep.com.ComposeProject] (docker-java-stream--828628424) [container-runtime-1] : Caused by: jakarta.enterprise.inject.CreationException: Error creating synthetic bean [WGSHmpx0SCzkqwzGIoLhJiCxhYQ]: jakarta.enterprise.inject.CreationException: Error creating synthetic bean [atnaaCL2Dl_PisR4o7jLJ6WlL7U]: java.lang.IllegalStateException: gRPC client runtime-reporter is missing configuration.

Am I misunderstanding something about how to configure the gRPC client? Why are these environment variables not working? When testing the application I am putting in the container, if I run it locally in test mode with the following application-dev.yml configuration, it does work:

quarkus.grpc.clients.runtime-reporter.host=localhost
quarkus.grpc.clients.runtime-reporter.test-port=9081
quarkus.grpc.clients.runtime-reporter.port=9081

All my other environment variables are picked up fine by Quarkus

[quarkus-bot[bot]]

/cc @alesj (grpc), @cescoffier (grpc), @edeandrea (container-image), @geoand (container-image), @radcortez (config)

[LarsSven]

I have tested both QUARKUS_GRPC_CLIENTS__RUNTIME_REPORTER__HOST and QUARKUS_GRPC_CLIENTS_RUNTIME_REPORTER_HOST, but neither seem to have any effect.

[radcortez]

Do you have a dotted named property in your deployed application? Setting only QUARKUS_GRPC_CLIENTS__RUNTIME_REPORTER__HOST is not enough, because we dont know how to match RUNTIME_REPORTER. Is it runtime.reporter or runtime-reporter? By default, it uses the dot.

So in these cases, you need to add a quarkus.grpc.clients.runtime-reporter.host somewhere (it may be empty) to help disambiguate the name. Please check https://quarkus.io/guides/config-reference#environment-variables

[LarsSven]

Yeah we use runtime-reporter so that may be it, thanks for the help.

I will check tomorrow whether this indeed works, but that's very helpful, thanks!

[LarsSven]

That indeed worked, thank you.