Github user fhueske commented on the pull request: https://github.com/apache/flink/pull/1138#issuecomment-146835992 Looks good. I added one commit to restore binary compatibility. The code is not super nice, but it allows to runt programs which have been previously compiled without the need to recompile. We can still clean up the code later if we decide to do so. Final tests are running, will merge after they passed.
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