[root@ESK01 logstash]# ./bin/plugin install logstash-input-beats
Validating logstash-input-beats
ERROR: Installation aborted, verification failed for logstash-input-beats
start logstash that log report error:
[root@ESK01 logstash]# tail -f -n 10 /var/log/logstash/logstash.log
{:timestamp=>"2016-01-15T18:16:09.799000+0800", :message=>"Beats input: unhandled exception", :exception=>#<RuntimeError: unsupported protocol 72>, :backtrace=>["/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-beats-2.0.3/lib/lumberjack/beats/server.rb:225:in handle_version'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-beats-2.0.3/lib/lumberjack/beats/server.rb:210:inheader'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-beats-2.0.3/lib/lumberjack/beats/server.rb:163:in feed'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-beats-2.0.3/lib/lumberjack/beats/server.rb:342:inread_socket'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-beats-2.0.3/lib/lumberjack/beats/server.rb:319:in run'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-beats-2.0.3/lib/logstash/inputs/beats.rb:184:ininvoke'", "org/jruby/RubyProc.java:281:in call'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/concurrent-ruby-0.9.2-java/lib/concurrent/executor/executor_service.rb:515:inrun'", "Concurrent$$JavaExecutorService$$Job_754842357.gen:13:in `run'"], :level=>:error}