logstash error

gistfile1.txt

justin@logstashidx03:~$ sudo /opt/logstash/bin/logstash -t -f /etc/logstash/conf.d/logstash.conf
Bundler::GemNotFound: Could not find nokogiri-1.6.7-java in any of the sources
      materialize at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/spec_set.rb:92
             map! at org/jruby/RubyArray.java:2446
      materialize at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/spec_set.rb:85
            specs at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:132
        specs_for at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:177
  requested_specs at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:166
  requested_specs at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/environment.rb:18
            setup at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/runtime.rb:13
            setup at /opt/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler.rb:122
           setup! at /opt/logstash/lib/bootstrap/bundler.rb:64
           (root) at /opt/logstash/lib/bootstrap/environment.rb:56