aws serverless spring boot set up is failing

Question

here is my setup below,

@SpringBootApplication
@ComponentScan(basePackages = "com.amazonaws.serverless.sample.springboot.controller")
public class Application extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

public class LambdaHandler implements RequestStreamHandler {
    private SpringBootLambdaContainerHandler<AwsProxyRequest, AwsProxyResponse> handler;
    private static ObjectMapper mapper = new ObjectMapper();
    private Logger log = LoggerFactory.getLogger(LambdaHandler.class);

    @Override
    public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context)
            throws IOException {
        if (handler == null) {
            try {
                handler = SpringBootLambdaContainerHandler.getAwsProxyHandler(Application.class);

            } catch (ContainerInitializationException e) {
                e.printStackTrace();
                outputStream.close();
                return;
            }
        }

        AwsProxyRequest request = mapper.readValue(inputStream, AwsProxyRequest.class);

        AwsProxyResponse resp = handler.proxy(request, context);
        mapper.writeValue(outputStream, resp);
        // just in case it wasn't closed by the mapper
        outputStream.close();
    }
}

each time when when I am trying invoke my lambda from local console using command - "serverless invoke local -f hello" I am getting below exception,

j

ava.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.serverless.InvokeBridge.invoke(InvokeBridge.java:102)
        at com.serverless.InvokeBridge.<init>(InvokeBridge.java:40)
        at com.serverless.InvokeBridge.main(InvokeBridge.java:153)
Caused by: java.lang.NoClassDefFoundError: javax/servlet/ServletContainerInitializer
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at com.amazonaws.serverless.proxy.spring.SpringBootLambdaContainerHandler.initialize(SpringBootLambdaContainerHandler.java:167)
        at com.amazonaws.serverless.proxy.spring.SpringBootLambdaContainerHandler.getAwsProxyHandler(SpringBootLambdaContainerHandler.java:77)
        at com.techprimers.serverless.services.AWSLambdaHandler.handleRequest(AWSLambdaHandler.java:172)
        ... 7 more
Caused by: java.lang.ClassNotFoundException: javax.servlet.ServletContainerInitializer
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)

        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 23 more

at line - "handler = SpringBootLambdaContainerHandler.getAwsProxyHandler(Application.class);"

Please HELP me resolve this, I tried various ways of boot setup with aws lambda but failed every time. Please help me fix this or help me out in setting up in any other way. Thanks.

Answer 1

In your logs we can see :

NoClassDefFoundError: javax/servlet/ServletContainerInitializer ClassNotFoundException: javax.servlet.ServletContainerInitializer

Could you please check if libs are loaded , there must be something missing and not loaded up correctly

Also, something like this has been done

<dependency>
    <groupId>com.amazonaws.serverless</groupId>
    <artifactId>aws-serverless-java-container-spring</artifactId>
    <version>1.3.2</version>
</dependency>

Also double check steps in : https://github.com/awslabs/aws-serverless-java-container/wiki/Quick-start---Spring-Boot

Answer 2

I had the same issue. I was using version 0.2 of aws-serverless-java-container-spring and had to switch to version 1.3.2 as the former version didn't have SpringBootLambdaContainerHandler class.