Exists query not working on some fields in my index (version 5.1.1)

Elastic Stack Elasticsearch
1

I have an index with ~122 million documents. Some of the fields don't seem to be working with the exists query. For example, I have a doc like the following (many other fields omitted for brevity):

curl -XGET 'http://myes.com/my_index/my_docs/1000022379001'
{"_index":"my_index","_type":"my_docs","_id":"1000022379001","_version":4,"found":true,"_source":{"account_id":"782847669001","projection":"something"}}

But when I search all docs where projection exists, I get 0 hits:

curl -XGET 'http://myes.com/my_index/my_docs/_search?pretty' -d '
> {
>   "query": {
>     "exists": { "field": "projection" }
>   }
> }
> '
{
  "took" : 3,
  "timed_out" : false,
  "_shards" : {
    "total" : 24,
    "successful" : 24,
    "failed" : 0
  },
  "hits" : {
    "total" : 0,
    "max_score" : null,
    "hits" : [ ]
  }
}

The mapping for the projection field is:

"projection": {
  "type": "keyword",
  "doc_values": false
},

Any thoughts or ideas on why this isn't working? Am I missing something?

Thanks,

Scott

2

My bad... I had messed up the json file that defined my mapping. Sorry for the noise!