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@@ -6,6 +6,23 @@
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//Installation and Upgrade Guide
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//tag::notable-breaking-changes[]
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+[[_type-search-matches-no-docs]]
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+.Searches on the `_type` field are no longer supported.
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+[%collapsible]
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+====
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+*Details* +
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+In 8.x, the `_type` metadata field has been removed. {es} now handles a search
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+on the `_type` field as a search on a non-existent field. A search on a
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+non-existent field matches no documents, regardless of the query string.
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+
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+In 7.x, a search for `_doc` in the `_type` field would match the same documents
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+as a `match_all` query.
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+
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+*Impact* +
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+Remove queries on the `_type` field from your search requests and search
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+templates. Searches that include these queries may return no results.
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+====
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+
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[[msearch-empty-line-support]]
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.The multi search API now parses an empty first line as action metadata in text files.
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[%collapsible]
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James Rodewig