The lastest versions of ElasticSearch comes eith "FiledData" off by default.
The file produces erroneus graph´s (no graphs in web). I can see LAstest Values but no graph.
In the log of ElasticSearch i see:
Caused by: java.lang.IllegalArgumentException: . Set fielddata=true on [value] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.