Github user edespino commented on the issue:

    https://github.com/apache/incubator-hawq/pull/918
  
    @xunzhang - I feel the error message received when using the tools is 
sufficient enough.  It informs the user the require JSON package is not 
installed and where to get it from (www.cpan.org).  That should be sufficient 
for a developer to install the module for use with the Perl utilities.  It is 
what I used when manually updating my system with the JSON module on my system 
in order to run the tidycat.pl utility.  Is that sufficient?


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