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<h2 class="title"><a id="elasticsearch-breaking-changes"></a>Elasticsearch breaking changes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/stack-docs/edit/7.10/docs/en/install-upgrade/breaking.asciidoc">edit</a></h2>
</div></div></div>
<p>This list summarizes the most important breaking changes in Elasticsearch 7.10.2. For
the complete list, go to <a href="/guide/en/elasticsearch/reference/7.10/breaking-changes.html" class="ulink" target="_top">Elasticsearch breaking changes</a>.</p>
<h4><a id="breaking_710_security_changes"></a>Authentication changes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.10/docs/reference/migration/migrate_7_10.asciidoc">edit</a></h4>
<details id="api-keys-require-name-property">
<summary class="title">API keys now require a <code class="literal">name</code> property.</summary>
<div class="content">
<p><span class="strong strong"><strong>Details</strong></span><br>
The <code class="literal">name</code> property is now required to create or grant an API key.</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">{
"...": "...",
"api_key": {
"name": "key-1"
}
}</pre>
</div>
<p><span class="strong strong"><strong>Impact</strong></span><br>
To avoid errors, specify the <code class="literal">name</code> property when creating or granting API keys.</p>
</div>
</details>
<h4><a id="breaking_710_java_changes"></a>Java changes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.10/docs/reference/migration/migrate_7_10.asciidoc">edit</a></h4>
<details id="supplier-searchlookup-arg">
<summary class="title">The <code class="literal">MappedFieldType#fielddataBuilder</code> method now accepts a <code class="literal">Supplier<SearchLookup></code> argument.</summary>
<div class="content">
<p><span class="strong strong"><strong>Details</strong></span><br>
To support future feature development, the existing
<code class="literal">MappedFieldType#fielddataBuilder</code> method now accepts a new
<code class="literal">Supplier<SearchLookup></code> argument.</p>
<p><span class="strong strong"><strong>Impact</strong></span><br>
If you develop or maintain a mapper plugin, update your implementation of the
<code class="literal">MappedFieldType#fielddataBuilder</code> method to accommodate the new signature.</p>
</div>
</details>
<h4><a id="breaking_710_networking_changes"></a>Networking changes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.10/docs/reference/migration/migrate_7_10.asciidoc">edit</a></h4>
<details>
<summary class="title">The <code class="literal">*.tcp.keep_idle</code> and <code class="literal">*.tcp.keep_interval</code> settings are now limited to <code class="literal">300</code> seconds.</summary>
<div class="content">
<p><span class="strong strong"><strong>Details</strong></span><br>
The <code class="literal">{network,transport,http}.tcp.keep_idle</code> and
<code class="literal">{network,transport,http}.tcp.keep_interval</code> settings now have a maximum
value of <code class="literal">300</code> seconds, equivalent to 5 minutes.</p>
<p><span class="strong strong"><strong>Impact</strong></span><br>
If specified, ensure the <code class="literal">{network,transport,http}.tcp.keep_idle</code> and
<code class="literal">{network,transport,http}.tcp.keep_interval</code> settings do not exceed <code class="literal">300</code>
seconds. Setting <code class="literal">{network,transport,http}.tcp.keep_idle</code> or
<code class="literal">{network,transport,http}.tcp.keep_interval</code> to a value greater than <code class="literal">300</code>
seconds in <code class="literal">elasticsearch.yml</code> will result in an error on startup.</p>
</div>
</details>
<h4><a id="breaking_710_search_changes"></a>Search changes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.10/docs/reference/migration/migrate_7_10.asciidoc">edit</a></h4>
<details id="max-doc-value-field-search-limits">
<summary class="title">The <code class="literal">index.max_docvalue_fields_search</code> setting now limits doc value fields returned by <code class="literal">inner_hits</code> or the <code class="literal">top_hits</code> aggregation.</summary>
<div class="content">
<p><span class="strong strong"><strong>Details</strong></span><br>
The <code class="literal">index.max_docvalue_fields_search</code> setting limits the number of doc value
fields retrieved by a search. Previously, this setting applied only to doc value
fields returned by the <code class="literal">docvalue_fields</code> parameter in a top-level search. The
setting now also applies to doc value fields returned by an <code class="literal">inner_hits</code> section
or <code class="literal">top_hits</code> aggregation.</p>
<p><span class="strong strong"><strong>Impact</strong></span><br>
If you use <code class="literal">inner_hits</code> or the <code class="literal">top_hits</code> aggregation, ensure
<code class="literal">index.max_docvalue_fields_search</code> is configured correctly for your use case.</p>
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