Fields show up as nested JSON in Kibana

Stack

When Packetbeat exports a field of type dictionary, and the keys are not known in advance, the Discovery page in Kibana will display the field as a nested JSON object:

 http.response.headers = { "content-length": 12, "content-type": "application/json" } 

To fix this you need to reload the index pattern in Kibana under the Management→Index Patterns, and the index pattern will be updated with a field for each key available in the dictionary:

 http.response.headers.content-length = 12 http.response.headers.content-type = "application/json"