Github user justinleet commented on the issue:
https://github.com/apache/metron/pull/827
I ran a request giving sensors:
```
curl -X POST --header 'Content-Type: application/json' --header 'Accept:
application/json' -d '["snort", "bro"]'
'http://node1:8082/api/v1/search/column/metadata'
```
which returns fine
```
{
"TTLs": "double",
"bro_timestamp": "string",
"enrichments:geo:ip_dst_addr:location_point": "other",
"sha256": "string",
"enrichmentjoinbolt:joiner:ts": "date",
"certificate:version": "integer",
...
}
```
but giving the actual indices returns nothing, e.g.
```
curl -X POST --header 'Content-Type: application/json' --header 'Accept:
application/json' -d '["bro_index_2017.11.17.14"]'
'http://node1:8082/api/v1/search/column/metadata'
```
I assume it's intentional that indices don't actually return data, which
I'm fine with, but we need to rename things from indices to sensor or something.
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