Dear Henry and folks, In TAJO-28 (https://issues.apache.org/jira/browse/TAJO-28), there was a discussion of switching protocol buffers to another one. Henry's suggestion is to switch protocol buffer to avro. At that time, I said that I'll create jira issues for it. I'm sorry for late response.
At the first time, I also +1ed for the switching. However, Tajo has heavily used protocol buffers throughout the project. It will cause many overheads for us. If you are ok, I would like to postpone this discussion. I think that there are many important issues to be solved right now. Best regards, Hyunsik
