Kibana keeps some fields unindexed

Question

So I have an index in elasticsearch, and I want to search and visualize the index with Kibana. But several fields are not indexed by Kibana, and have this bubble: This field is not indexed thus unavailable for visualization and search. This is a snippet of one of the fields that is not indexed by Kibana:

"_event_name" : {
    "type" : "string"
},

I tried to enter Kibana's index settings and click "Reload field list", but it doesn't help.

Does anyone knows what could be the problem?

Thanks in advance

Answer 1

The fields might not be indexed as mentioned here.

Answer 2

Apparently, Kibana doesn't index fields that start with underscore.

Answer 3

How are you loading the data into Elasticsearch? Logstash? A Beat? curl? Please describe that and if you can include your config file that would be good.

You can look at your mapping in your browser with something like this;

http://localhost:9200/logstash-2016.07.20/_mapping?pretty

(change the host and index name)