It seems like there's a good amount of incompatibility between java and python wrt beam Rows. For example the following are unsupported in python (that I've noticed so far) - BYTE - INT16 - OneOf
Additionally, it seems like nullable fields don't really work correctly, the java BitSetCoder won't encoding trailing empty bytes in the BitSet, but the python side is expecting every num_fields / 8 bytes to be present. [1] Certainly these are bugs, but in general it seems to point to a lack of integration testing for xlang interop in general. I plan on submitting PRs to fix the bugs above (or at least some of them), are there tests I can change to better exercise these paths? [1] https://github.com/apache/beam/blob/master/sdks/python/apache_beam/coders/row_coder.py#L198
