Lambda Kinesis EventSourceMapping filters match if any record in the batch matches

[freddieforsythfs]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When the lambda kinesis event source mapping has a filter pattern applied, all records in the batch are delivered to the Lambda if a single message from the batch matches the filter condition.

Note this is a bug here (it should be filteredRecords)

localstack/localstack/services/lambda_/event_source_listeners/stream_event_source_listener.py

Line 242 in 2cd0ef6

stream_arn, records, shard_id=shard_id

Expected Behavior

Only filtered records from the batch are delivered to the lambda.

How are you starting LocalStack?

With a docker-compose file

Steps To Reproduce

Start LocalStack
Create a Lambda
Create a Kinesis Stream
Create an Event Source Mapping between the Lambda and the Kinesis with a filter in the JSON path
Publish 3 events, only one of which has the JSON path associated with the filter
All events are delivered to the Lambda

Environment

- OS:
- LocalStack:

Anything else?

No response

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