ruby on rails - Logstash with Jruby - how does it works? -

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i'm bit confused jruby/ruby versions in logstash.

according this github page, current jruby version 9.1.9.0. when build new gem following steps here see gemfile created "1.9" (gemfile.jruby-1.9.lock) old ruby (or jruby?) version. isn't supposed created 2.x?

i've started looking because want use google-cloud-pubsub works ruby 2.0+





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