java.lang.NoClassDefFoundError in Java Lambda

Question

I'm triying to create my first lambda function in Java.

I want to start with a little example, reading a S3 Input Event.

It's my code:

package com.amazonaws.lambda.alfreddo;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.lambda.runtime.events.S3Event;

public class LambdaFunctionHandler implements RequestHandler<S3Event, String> {

    @Override
    public String handleRequest(S3Event input, Context context) {
        context.getLogger().log("Input: " + input);

        // TODO: implement your handler
        return "Hello from Lambda!";
    }

}

But, when in i try to run it on AWS Console i get the next error:

{
  "errorMessage": "Error loading method handleRequest on class com.amazonaws.lambda.alfreddo.LambdaFunctionHandler",
  "errorType": "java.lang.NoClassDefFoundError"
}

Error loading method handleRequest on class com.amazonaws.lambda.alfreddo.LambdaFunctionHandler: java.lang.NoClassDefFoundError
java.lang.NoClassDefFoundError: com/amazonaws/services/lambda/runtime/events/S3Event
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetPublicMethods(Class.java:2902)
    at java.lang.Class.getMethods(Class.java:1615)
Caused by: java.lang.ClassNotFoundException: com.amazonaws.services.lambda.runtime.events.S3Event
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 4 more

I'm using the AWS Toolkit for Eclipse.

any help?

Thanks!

Answer 1

Had similar problem, adding maven-shade-plugin and rebuilding with GOAL: package shade:shade solved the issue