Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/290#issuecomment-69920591
@uce Yes, it will be copied from off-heap to heap first. There are also
other places like the `EventSerializer` where this is the case. I guess it
depends on the amount of data that is being copied. If you want to operate on a
byte array, then you have to copy it into the JVM heap.
@uce I ran the integration tests manually. We could add the random testing
in a separate pull request.
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