GitHub user sebbASF opened an issue:
https://github.com/apache/incubator-ponymail/issues/316
Bug: elastic.scan with search_type=scan disables sort yet callers use sort
Both pminfo.lua and stats.lua use elastic.scan.
The queries include sort clauses (by date or epoch desc), however these are
ignored when search_type=scan is used (as is currently the case for
elastic.scan).
Does it even make sense to sort scrolled queries ?
By their very nature such queries are intended for large numbers of
results, which will be very expensive to sort in general.
ES 5.0 no longer supports search_type=scan [1]
Instead one can sort by _doc which is optimised to behave like
search_type=scan
[1] [1]
https://www.elastic.co/guide/en/elasticsearch/reference/5.1/breaking_50_search_changes.html#_literal_search_type_scan_literal_removed
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