Cherry-pick #14341 to 7.x: Add default_field option to fields.yml #14710
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Cherry-pick of PR #14341 to 7.x branch. Original message:
The number of fields in the Elasticsearch index template's
settings.index.query.default_field
option has grown over time, and is now greater than 1024 in Filebeat (Elastic licensed version). This causes queries to Elasticsearch to fail when a list of fields is not specified because there is a default limit of 1024 in Elasticsearch.This adds a new setting to fields.yml called
default_field
whose value can be true/false (defaults to true). When true the text/keyword fields are added to thedefault_field
list (as was the behavior before this change). And when set to false the field is omitted from the default_field list.This adds a test for every beat to check if the default_field list contains more than 1000 fields. The limit is a little less than 1024 because
fields.*
is in the default_field list already and at query time that wildcard will be expanded and count toward the limit.Fixes #14262