make things identical when they should

Author: SylvainJuge

instrumentation/play/play-ws/play-ws-2.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/playws/v2_0/PlayWsInstrumentationModule.java

@@ -18,6 +18,7 @@
 import io.opentelemetry.javaagent.instrumentation.playws.AsyncHttpClientInstrumentation;
 import io.opentelemetry.javaagent.instrumentation.playws.HandlerPublisherInstrumentation;
 import java.util.List;
+import javax.annotation.Nullable;
 import net.bytebuddy.asm.Advice;
 import net.bytebuddy.asm.Advice.AssignReturned;
 import net.bytebuddy.asm.Advice.AssignReturned.ToArguments.ToArgument;
@@ -76,7 +77,7 @@ public static Object[] methodEnter(
     @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
     public static void methodExit(
         @Advice.Argument(0) Request request,
-        @Advice.Thrown Throwable throwable,
+        @Advice.Thrown @Nullable Throwable throwable,
         @Advice.Enter Object[] enterResult) {
       Context context = (Context) enterResult[0];
       if (context != null && throwable != null) {

instrumentation/play/play-ws/play-ws-2.1/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/playws/v2_1/PlayWsInstrumentationModule.java

@@ -60,6 +60,7 @@ public static Object[] methodEnter(
       if (!instrumenter().shouldStart(parentContext, request)) {
         return new Object[] {null, asyncHandler};
       }
+
       Context context = instrumenter().start(parentContext, request);
 
       if (asyncHandler instanceof StreamedAsyncHandler) {