Invoking other Lambdas synchronously from a Lambda is a scalability anti-pattern. Lambdas have a maximum execution time before they timeout (15 minutes as of May 2021). Having to wait for another Lambda to finish its execution could lead to a timeout.
A better solution is to generate events that can be consumed asynchronously by other Lambdas.
With AWS SDKv1
InvokeRequest invokeRequest = new InvokeRequest() .withFunctionName("myFunction"); AWSLambda awsLambda = AWSLambdaClientBuilder.standard() .withCredentials(new ProfileCredentialsProvider()) .withRegion(Regions.US_WEST_2).build(); awsLambda.invoke(invokeRequest); // Noncompliant