If you are using the Http2Client for the service to service communication, you need to include all client related modules into your pox.xml file. You can find these modules from light-consumer-4j which is a convenient fat client that packages all consumer side modules together.
If you are working with an original client, you’d better use the light-consumer-4j instead of including all modules individually. light-consumer-4j also implement retry and circuit breaker to further guarantee the connectivity to the APIs/services.
This dependency will include the submodules required to support client consumption of an API like service discovery, load balancing, oauth2 integration, etc.