Invoking lambda from lambda: AWS Lambda concurrent execution limits

Question

My current AWS Lambda function invokes another AWS Lambda function but I want to make sure that the invoke succeeded. After looking at concurrent execution limits for AWS Lambda I am trying to figure out what would happen if the concurrent limit is hit and I tried to invoke the Lambda from another Lambda. For now, I am solving this problem by putting messages in an SNS but I rather prefer invoking Lambda directly avoiding the indirection.

Answer 1

The best way to handle the concurrent limit is to use a Kinesis stream rather than SNS. The number of shards will limit the number of lambda invoked. And if it pertinent for you, you can take several messages at once, which you can't do with SNS, and that can lead to hit the concurrent limit.