Update: I was using an older clone of datajson, upon update and rebuild the "DataJson" error was fixed, but the "DataJsonHarvester" error in the following comment is still an issue. The noted fix when using WSGI does not resolve the issue.
I am getting the following error when datajson plugin is enabled. I can provide more information if needed.
err.datajson.txt
CKAN version 2.6.0
OS: CentOS 7
Python 2.7
Setuptools 30.0.0
I believe another individual is getting a similar error for 'DataJsonHarvester'. He is running ubuntu.