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Why is this an issue?
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.
Noncompliant code example
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

Resources

  
 Best practices for working with AWS Lambda functions