when installing plugin (/logstash-plugin install logstash-input-jmx) i have the folowing error :
bundle update will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
Bundler could not find compatible versions for gem "logstash":
logstash-input-jmx (>= 0) java depends on
logstash (< 2.0.0, >= 1.4.0) java
Could not find gem 'logstash (< 2.0.0, >= 1.4.0) java', which is required by gem 'logstash-input-jmx (>= 0) java', in any of the sources.