GitHub user sebbASF opened an issue:
https://github.com/apache/incubator-ponymail/issues/345
Bug: ES 5.x does not support word-cloud (stats.lua)
ES 5.x does not support the word-cloud code in stats.lua.
The query fails with:
"Fielddata is disabled on text fields by default. Set fielddata=true on
[subject] in order to load fielddata in memory by uninverting the inverted
index. Note that this can however use significant memory."
It can be fixed by changing the mapping as follows:
PUT ponymail/_mapping/mbox?update_all_types
{
"properties": {
"subject": {
"type": "text",
"fielddata": true
}
}
}
However this increases memory storage as noted above.
See
https://www.elastic.co/guide/en/elasticsearch/reference/5.0/fielddata.html#_fielddata_is_disabled_on_literal_text_literal_fields_by_default
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