global_ordinals_low_cardinality execution hints for terms aggregations have been removededit
execution_hint are removed and should be replaced by
The dynamic cluster setting named
search.max_buckets now defaults
to 10,000 (instead of unlimited in the previous version).
Requests that try to return more than the limit will fail with an exception.
missing option of the
composite aggregation, deprecated in 6.x,
has been removed.
missing_bucket should be used instead.
The object used to share aggregation state between the scripts in a Scripted Metric
Aggregation is now a variable called
state available in the script context, rather than
being provided via the
params object as
params._agg variable is still available as well.