The only change I made was the following that is documented on elasticsearch's website. Is there another way to be able to set "bootstrap.memory_lock: true" in the config file and have it start up?
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration-memory.html
-- vi /usr/lib/systemd/system/elasticsearch.service
[Service]
LimitMEMLOCK=infinity