The transport plugin for elasticsearch logstash output using shield does not seem to exist (again)?
Using the documentation at https://www.elastic.co/guide/en/shield/current/logstash.html#ls-transport
sudo logstash/bin/plugin install logstash-output-elasticsearch_java_shield
Validating logstash-output-elasticsearch_java_shield
Plugin logstash-output-elasticsearch_java_shield does not exist
This is on ubuntu, elasticsearch 2.0 logstash 2.0