# Install plugin using gem. GemNotFound
**URL:** https://discuss.elastic.co/t/install-plugin-using-gem-gemnotfound/116123
**Category:** Logstash
**Created:** [January 18, 2018, 7:34pm UTC](https://discuss.elastic.co/t/install-plugin-using-gem-gemnotfound/116123 "2018-01-18T19:34:20Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rschirin](https://discuss.elastic.co/u/rschirin)
#### Post date: [January 18, 2018, 7:34pm UTC](https://discuss.elastic.co/t/install-plugin-using-gem-gemnotfound/116123/1 "2018-01-18T19:34:21Z")
Hi,
I'm using logstash 5.6.5 on Centos7 and I need to use elasticsearch filter so I'm trying to install this plugin.
If I try the command l
> logstash-plugin install elasticsearch-filter
I receive the warning to check
> gem install logstash-core -v 5.6.5
So, first of all, I installed Ruby with yum.
Unfortunately, when I try command
> gem install logstash-core -v 5.6.5
I receive the message that logstash-core is available just for java platform.
What does it mean? What should I do? I didn't find anything in the official doc (how is it possible?)
Should I install jruby and not Ruby?
---
### Author:  [@rschirin](https://discuss.elastic.co/u/rschirin)
#### Post date: [January 19, 2018, 10:09am UTC](https://discuss.elastic.co/t/install-plugin-using-gem-gemnotfound/116123/2 "2018-01-19T10:09:30Z")
update: at the beginning, using ./logstash-plugin list command I was able to see the complete list of installed plugins.
after that I installed ruby/gem I'm facing another issue and list is not available:
```
Bundler::GemNotFound: Could not find gem 'logstash-filter-elasticsearch (>= 0) java' in any of the gem sources listed in your Gemfile or installed on this machine.
verify_gemfile_dependencies_are_found! at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:328
each at org/jruby/RubyArray.java:1613
verify_gemfile_dependencies_are_found! at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:307
start at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:199
resolve at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:182
resolve at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:192
specs at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:132
specs_for at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:177
requested_specs at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:166
requested_specs at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/environment.rb:18
setup at /usr/share/logstash/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/runtime.rb:13
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:67
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:48
```
can someone help me?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 16, 2018, 10:09am UTC](https://discuss.elastic.co/t/install-plugin-using-gem-gemnotfound/116123/3 "2018-02-16T10:09:35Z")
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