# Logstash-plugin list display Gem errors

**URL:** <https://discuss.elastic.co/t/logstash-plugin-list-display-gem-errors/71755>\
**Category:** Logstash\
**Created:** [January 16, 2017, 3:05pm UTC](https://discuss.elastic.co/t/logstash-plugin-list-display-gem-errors/71755 "2017-01-16T15:05:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![smutel](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/smutel/32/75550_2.png) [@smutel](https://discuss.elastic.co/u/smutel)\
**Post date:** [January 16, 2017, 3:05pm UTC](https://discuss.elastic.co/t/logstash-plugin-list-display-gem-errors/71755/1 "2017-01-16T15:05:24Z")

</div>

Hello,

When I execute the command "/usr/share/logstash/bin/logstash-plugin list", I have the error below:

> Gem::LoadError: You have already activated json 1.8.6, but your Gemfile requires json 1.8.3. Prepending `bundle exec` to your command may solve this.  
> setup at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/runtime.rb:34  
> each at org/jruby/RubyArray.java:1613  
> each at /usr/share/logstash/vendor/jruby/lib/ruby/1.9/forwardable.rb:201  
> setup at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/runtime.rb:19  
> setup at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler.rb:122  
> setup! at /usr/share/logstash/lib/bootstrap/bundler.rb:64  
> execute at /usr/share/logstash/lib/pluginmanager/list.rb:17  
> run at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67  
> execute at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/subcommand/execution.rb:11  
> run at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67  
> run at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:132  
> (root) at /usr/share/logstash/lib/pluginmanager/main.rb:44

I am sure that I did something wrong but what thing?

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 13, 2017, 3:05pm UTC](https://discuss.elastic.co/t/logstash-plugin-list-display-gem-errors/71755/2 "2017-02-13T15:05:39Z")

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