Netty 3.8 had the wrong version in the config property (DataDog/dd-trace-java#1423)
MODIFY
instrumentation/netty/netty-3.8/src/main/java/io/opentelemetry/auto/instrumentation/netty/v3_8/NettyChannelPipelineInstrumentation.java
instrumentation/netty/netty-3.8/src/main/java/io/opentelemetry/auto/instrumentation/netty/v3_8/NettyChannelPipelineInstrumentation.java
@@ -54,7 +54,7 @@ import org.jboss.netty.handler.codec.http.HttpServerCodec;
public class NettyChannelPipelineInstrumentation extends Instrumenter.Default {
static final String INSTRUMENTATION_NAME = "netty";
- static final String[] ADDITIONAL_INSTRUMENTATION_NAMES = {"netty-3.9"};
+ static final String[] ADDITIONAL_INSTRUMENTATION_NAMES = {"netty-3.8"};
public NettyChannelPipelineInstrumentation() {
super(INSTRUMENTATION_NAME, ADDITIONAL_INSTRUMENTATION_NAMES);

Netty 3.8 had the wrong version in the config property (DataDog/dd-trace-java#1423)