Hi,
This is a notice on 0.17.x and full cluster restart when using the delete
by query API against specific types. When doing so, please execute a full
flush before (
http://www.elasticsearch.org/guide/reference/api/admin-indices-flush.html).
A 0.17.3 release to address this (and other bugs, and minor enhancements)
will be released on Thursday.
-shay.banon