Github user mateiz commented on the pull request:
https://github.com/apache/spark/pull/1338#issuecomment-50111889
@kanzhang it might mean that we're reusing the Bean object on the Java side
when we read from the InputFormat. Hadoop's RecordReaders actually reuse the
same object as you read data, so if you want to hold onto multiple data items,
you need to clone each one. This may be a fair bit of trouble unfortunately.
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