pfSense Logging - UDP Listener Died

Hi there,

I keep getting issues to get logstash working.
I am actually trying to run ELK stack to get logs from pfsense.

But I kept hitting into this issue of UDP Listener Died:

{:timestamp=>"2016-05-24T05:31:07.546000-0400", :message=>"SIGTERM received. Shutting down the pipeline.", :level=>:warn}
{:timestamp=>"2016-05-24T05:31:07.886000-0400", :message=>"UDP listener died", :exception=>#<IOError: closed stream>, :backtrace=>["org/jruby/RubyIO.java:3682:in `select'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-2.0.5/lib/logstash/inputs/udp.rb:77:in `udp_listener'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-2.0.5/lib/logstash/inputs/udp.rb:50:in `run'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.4-java/lib/logstash/pipeline.rb:334:in `inputworker'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.4-java/lib/logstash/pipeline.rb:328:in `start_input'"], :level=>:warn}

I am wondering if anyone has ever encountered this kind of issue before.
I've tried installing it on Ubuntu 16.10, 14.04 and CentOS 7, all gave me same error messages.

Thanks

What version?