May 19 15:34:53 elk systemd[1]: Starting Elasticsearch...
May 19 15:34:53 elk elasticsearch-keystore[24502]: Error: Could not find or load main class
May 19 15:34:53 elk elasticsearch-keystore[24502]: Caused by: java.lang.ClassNotFoundException:
May 19 15:34:53 elk systemd[1]: elasticsearch.service: Control process exited, code=exited, status=1/FAILURE
May 19 15:34:53 elk systemd[1]: elasticsearch.service: Failed with result 'exit-code'.
May 19 15:34:53 elk systemd[1]: Failed to start Elasticsearch.