server-receiver-plugin org.apache.skywalking 6.1.0-SNAPSHOT 4.0.0 receiver-proto jar org.xolstice.maven.plugins protobuf-maven-plugin 0.5.0 com.google.protobuf:protoc:3.3.0:exe:${os.detected.classifier} grpc-java io.grpc:protoc-gen-grpc-java:1.8.0:exe:${os.detected.classifier} compile compile-custom