# Logstash plugin development
**URL:** https://discuss.elastic.co/t/logstash-plugin-development/25476
**Category:** Logstash
**Created:** [July 13, 2015, 7:26pm UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476 "2015-07-13T19:26:15Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@karthikbox](https://discuss.elastic.co/u/karthikbox)
#### Post date: [July 13, 2015, 7:26pm UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476/1 "2015-07-13T19:26:15Z")
Hi all,
I'm trying to develop a filter plugin for logstash-1.5.
I've a cloned a community plugin repo(elapsed) from github.
Then i execute " **bundle install**" to install dependencies, at which point i get an error message "**Could not find gem 'logstash-devutils (\>= 0) ruby' in any of the gem sources listed in your Gemfile or available on this machine.**"
How to get around this? Any help would be appreciated.
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### Author:  [@jrgns](https://discuss.elastic.co/u/jrgns)
#### Post date: [July 14, 2015, 7:29am UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476/2 "2015-07-14T07:29:59Z")
Hey
Are you sure you're running JRuby? The last time I had this issue I was inadvertantly using MRI instead of JRuby.
J
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### Author:  [@karthikbox](https://discuss.elastic.co/u/karthikbox)
#### Post date: [July 15, 2015, 5:14pm UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476/3 "2015-07-15T17:14:48Z")
Thanks. I double checked and i wasnt using JRuby. Solved.
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### Author:  [@L8apex32](https://discuss.elastic.co/u/L8apex32)
#### Post date: [April 26, 2016, 8:03pm UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476/4 "2016-04-26T20:03:47Z")
I may be having the same problem. I took an existing filter, renamed it and all its contents, and am trying "bundle install'. This fails with no useful message.
bundle list says "Could not find gem 'logstash-devutils (\>= 0) ruby' in the gems available on this machine."
I have downloaded that gem from [rubygems.org](http://rubygems.org), its called logstash-devutils-0.0.19-java.gem.
Installing that gem gives:
ERROR: Error installing logstash-devutils-0.0.19-java.gem:
logstash-devutils requires rspec (~\> 3.1.0, runtime)
Installing that gem works, here is "gem list":
[root@system software]# gem list
\*\*\* LOCAL GEMS \*\*\*
bundler (1.5.2)
diff-lcs (1.2.5)
net-http-persistent (2.9.4)
rspec (3.4.0)
rspec-core (3.4.4)
rspec-expectations (3.4.0)
rspec-mocks (3.4.1)
rspec-support (3.4.1)
thor (0.18.1)
It seems that bundle is missing rspec, but "gem list" shows it installed.
I'm new go Ruby so any help would be great.
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### Author:  [@L8apex32](https://discuss.elastic.co/u/L8apex32)
#### Post date: [April 26, 2016, 8:05pm UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476/5 "2016-04-26T20:05:28Z")
Also, I don't know what JRuby is - I didn't skip that part, just don't understand.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:00am UTC](https://discuss.elastic.co/t/logstash-plugin-development/25476/6 "2017-07-06T05:00:27Z")