I had a problem with ElasticSearch and Rails, where some data was not indexed properly because of attr_protected. Where does Elastic Search store the indexed data? It would
Kibana is also a good solution. It is a data visualization platform for Elastic.If installed it runs by default on port 5601.
Out of the many things it provides. It has "Dev Tools" where we can do your debugging.
For example you can check your available indexes here using the command
GET /_cat/indices