rspec/rules/S6246/java/rule.adoc

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
----


== See

* https://docs.aws.amazon.com/lambda/latest/dg/best-practices.html[Best practices for working with AWS Lambda functions]