Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/621#issuecomment-120830865
I've updated the patch. I've written the wiki page named 'RPC Protocol
Design Guide'.
https://cwiki.apache.org/confluence/display/TAJO/RPC+Protocol+Design+Guide
This change is based on this guide. So, it may be easy to understand the
patch. Although, I'll make mode documentations about the exception hierarchy
and propagation feel free to ask me if you need more documentation for this
work.
Also, this work is a part of TAJO-1625. The error code and some APIs will
be evolved while I'm doing other issues in TAJO-1625.
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