Rc_rest (MissingSourceFile)

I am trying to run a server on ruby on rails but i get the error

/usr/lib/jruby-1.3.1/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31
warning: no super class for `OpenSSL::Digest’, Object assumed

a little lower i get

/usr/lib/jruby-1.3.1/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require’: no such file to load – rc_rest (MissingSourceFile)

what is --rc_rest and how do i get it?

what is the no super class warning?