Which branch of bitcoinj should I sync to?
https://github.com/bitcoinj/bitcoinj/issues/1336


  Just ran into this issue and spent a while debugging it (on latest release, 0.14.5). I added rpcserialversion=0 and that fixed the issue, so it's easy enough to work around. If bitcoinj isn't planning to add support for the new format, it might be nice for bitcoinj to realize it is parsing the new format, and throw a more relevant error message, something like "New rpc serial format not supported, see #1336".