- Version: 5alpha5 (repo install)
- Operating System: Centos 7
- Config File
very elementary

input {
tcp {
port => 5000
type => syslog
}
udp {
port => 5000
type => syslog
}
}

output {
kafka {
topic_id => CUSTOMER2
compression_type => gzip
}
}

- Steps to Reproduce:

• log output>
  {:timestamp=>"2016-08-18T11:34:46.920000+0000", :message=>"fetched an invalid config", :config=>"input {\n tcp {\n port => 5000\n type => syslog\n }\n udp {\n port => 5000\n type => syslog\n }\n}\n\noutput {\n kafka {\n topic_id => CUSTOMER2\n compression_type => gzip\n }\n}\n\n", :reason=>"Couldn't find any output plugin named 'kafka'. Are you sure this is correct? Trying to load the kafka output plugin resulted in this error: Problems loading the requested plugin named kafka of type output.", :level=>:error}
• First of all the plugin is there;
• Tried to reinstall the plugin in several versions via the update mechanism as well as manually downloading the gem, both fail;
  bin/logstash-plugin install --version 5.0.0 logstash-output-kafka
  Validating logstash-output-kafka-5.0.0
  Installing logstash-output-kafka
  Error Bundler::InstallError, retrying 1/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 2/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 3/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 4/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 5/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 6/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 7/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  Error Bundler::InstallError, retrying 8/10
  An error occurred while installing logstash-core-event-java (5.0.0.pre.alpha5), and Bundler cannot continue.
  Make sure that gem install logstash-core-event-java -v '5.0.0.pre.alpha5' succeeds before bundling.
  WARNING: SSLSocket#session= is not supported
  WARNING: SSLSocket#session= is not supported
• Afterwards the plugin list breaks due to a failed update
  Bundler::GemNotFound: Could not find gem 'logstash-output-kafka (= 5.0.0) 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: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:43