The classloader trick won't be needed after

a3d23cc12d

spring-cloud-function-adapters/spring-cloud-function-adapter-gcp/src/main/java/org/springframework/cloud/function/adapter/gcloud/FunctionInvoker.java

@@ -56,7 +56,7 @@ public class FunctionInvoker
 
 	private void init() {
 		System.setProperty("spring.http.converters.preferred-json-mapper", "gson");
-		Thread.currentThread() //TODO investigate if it is necessary
+		Thread.currentThread() // TODO: remove after upgrading to 1.0.0-alpha-2-rc5
 				.setContextClassLoader(FunctionInvoker.class.getClassLoader());
 		initialize(null);
 	}