From the creators of Akka, get technology enhancements, monitoring, and expert support with Akka Platform from Lightbend. Learn More
The Lightbend Family

Akka gRPC

Version 2.0.0

Troubleshooting

Client

java.lang.IllegalArgumentException: Could not find Jetty NPN/ALPN or Conscrypt as installed JDK providers

Perhaps surprisingly, this error may be thrown when connecting to an insecure gRPC server with a client that is configured with TLS enabled.

Server

java.util.concurrent.ExecutionException: io.grpc.StatusRuntimeException: UNAVAILABLE: Failed ALPN negotiation: Unable to find compatible protocol

This may happen when akka.http.server.preview.enable-http2 is not enabled in the configuration.

Deployment
Found an error in this documentation? The source code for this page can be found here. Please feel free to edit and contribute a pull request.