But obviously, at least one is missing. Which one is it or how can I know this? Where can I find it?
PS: If useful, I added the following JARs : -elasticsearch -elasticsearch-transport -elasticsearch-rest-client -elasticsearch-rest-high-level-client -elasticsearch-rest-high-level-client-sniffer (All the five are 6.1.3)
Piece of advice for those who want to do a small project like me and not use Maven: use Maven. "elasticsearch-rest-high-level-client" is recursively relying on 60 or 70 dependencies. Maven (or Gradle) handles everything.