Date histogram interval: ElasticSearchParseException

[ineu]

Hello.
With ES 0.90.5 date histograms are partially working: if you select '1M' or 'auto', you get 400 from ES and "ElasticSearchParseException[Failed to parse [auto]]" in kibana. According to ES docs (http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-date-histogram-facet.html):

The interval allows to set the interval at which buckets will be created for each hit. It allows for the constant values of year, quarter, month, week, day, hour, minute.
It also support time setting like 1.5h (up to w for weeks).

So neither '1M' nor 'auto' are valid values.

[KallDrexx]

Why was month removed instead of replaced with the correct interval value (since the ES docs claim that it supports month intervals)?

[serboctor]

Sending 'month' instead of '1M' to elasticsearch works fine. But currently Kibana doesn't accept 'month', so if you update the code to accept 'month' then everything will work fine.