date_histogram fails for year buckets >1, like "10y" #8939
Description
Attempting to do a date_histogram with 10-year sized buckets, passing "10y" to the interval setting results in this error:
ElasticsearchParseException[Failed to parse [10y]]; nested: NumberFormatException[For input string: \"10y\"];
As a workaround, I can specify large values for "weeks", so swapping in 520w (or 3650d) might be inaccurate, but possibly acceptable to some folks.
Sample agg (taken from Kibana 4) that causes the NumberFormatException:
"date_histogram": {
"field": "@timestamp",
"interval": "1y",
"min_doc_count": 1,
"extended_bounds": {
"min": -1767196800000,
"max": 1418425008298
}
}