What does this INFO message mean in the aws cloudtrail logs where fetched records but wrote 0?

[zoeygirl45]

INFO pid=2134 tid=MainThread file=aws_cloudtrail.py:process_CT_notifications:597 | processing 524 records in s3:aws-hhs-cms-oc-cloudtrail/AWSLogs/842420567215/CloudTrail/us-east-1/2015/05/28/842420567215_CloudTrail_us-east-1_20150528T1435Z_avvv2gv1U1OizJut.json.gz
2015-05-28 10:38:51,609 INFO pid=2134 tid=MainThread file=aws_cloudtrail.py:process_CT_notifications:634 | fetched 524 records, wrote 0, discarded 524, redirected 0 from s3:aws-hhs-cms-oc-cloudtrail/AWSLogs/842420567215/CloudTrail/us-east-1/2015/05/28/842420567215_CloudTrail_us-east-1_20150528T1435Z_avvv2gv1U1OizJut.json.gz

[jacobwilkins]

See this:

http://answers.splunk.com/answers/239387/why-is-the-splunk-add-on-for-amazon-web-services-n.html#ans...

Probably the same thing for you. Probably normal and expected.