ES 6.x
See this in the logs
[keystore.password] setting was deprecated in Elasticsearch and will be removed in a future release!
Have searched the breaking changes and did not find any details.
I did come across
https://www.elastic.co/guide/en/elasticsearch/reference/current/security-settings.html#_java_keystore_files and
https://www.elastic.co/guide/en/elasticsearch/reference/current/secure-settings.html
Can anyone confirm this setting is being deprecated in favor of the "secure" setting? keystore.secure_password
Thanks