Github user brkyvz commented on the pull request:

    https://github.com/apache/spark/pull/9153#issuecomment-150842453
  
    @tdas @mengxr Tested this. Streams work fine. In addition, I don't think we 
need anything extra for checkpointing of records. Excerpt from [official 
Kinesis 
docs](http://docs.aws.amazon.com/kinesis/latest/dev/kinesis-kpl-consumer-deaggregation.html):
    
    > You are not required to change your existing calls to do checkpointing in 
conjunction with aggregation. It is still guaranteed that you can retrieve all 
records successfully stored in Amazon Kinesis.
    
    ...
    > If skipping (or duplication) of records when stopping and restarting your 
consumer’s record processing is not important, you can run your existing code 
with no modification.


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