From: Charles Oliver Nutter <charles.nutter@...>
Date: 2007-12-05T16:31:55+09:00
Subject: Re: Ruby works but not JRuby - when using MySQL Driver

Venks wrote:
> Below is the error while running with JRuby:
> 
> connection.rb:4: /usr/lib/ruby/gems/1.8/gems/mysql-2.7/mysql.so:0:
> Invalid char `\177' in expression (SyntaxError)
>         from connection.rb:4:in `require'
>         from connection.rb:4
> 
> Is this a compatibility issue between JRuby and MySQL driver writting
> in Ruby? Is this expected behaviour or can this be addressed?

The pure Ruby MySQL driver should be fine, but it looks like you've got 
the non-pure-Ruby driver and it's trying to load it. There's a known bug 
in JRuby that it will try to load .so files as Ruby source (oops), but 
no amount of magic will make it load native extensions (yet).

Make sure you're using a pure Ruby MySQL driver if you want to access SQL.

- Charlie