While setting AWS Lambda settings we have a retry count of 2 (max) by default.
But when I am adding DynamoDB Trigger to it, there is retry option of 10,000
So which settings is true. If exception occurs will the retry will be 10,000 times or 2 times. Can someone please guide me. Thanks!
What you are describing are two different things.
The first one (retries of 2) is for asynchronous invocation of lambda. This means that you (or some service) invokes lambda function and it does not wait for the results. In this case lambda service will try to invoke your function in the background 2 times, on condition that the original attempt fails.
The second one (retries of 10000) is for Event Source Mapping. This is a special process in the lambda service which monitors data sources (in this case DynamoDB stream) and invokes your function on your behalf. You are not involved in this process, except for setting up the mapping. In this case the event source mapping invokes your lambda synchronously. It will try doing this 10000 times in case of errors. This is a separate setting from the retry setting used for asynchronous invocations.
Hope this helps.
So which settings are true. If an exception occurs will the retry will be 10,000 times or 2 times.
Both retries have different purpose and meaning.
Lambda reads items from the event source and triggers the function.
this retires isn't in the context of a function. once it pulls the event from the stream then it will trigger the lambda with desired stream event.
You can look into the below diagram for board picture that is the same example with kinesis stream
You can read more this below
