No index mapper found for field [image.JCD.hash.BIT_SAMPLING] returning default postings format

[daviddyball]

Hi,

Thanks a bunch for updating the elasticsearch-image plugin to be 2.x compatible. I really appreciate all the work you've done.

I was wondering if you could assist with some warning messages I'm getting in the logs when I index an image using v2.3.3 of the plugin. The errors repeat for all enabled features, but here is one I get for JCD:

[WARN ] [index.codec         ] [search] [classifier] No index mapper found for field [image.JCD.hash.BIT_SAMPLING] returning default postings format

My mapping is as follows:

...
        "image": {
            "type": "image",
            "feature": {
                "JCD": {
                    "hash": ["BIT_SAMPLING"]
                }
            }
        },
...

Any thoughts on why it's spitting out these warnings? Do I need to specify a type on each feature?

Thanks again for the awesome work on the plugin.

Regards,
D