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            <title>[DOCS-15256] [SERVER] Investigate changes in SERVER-63479: Correct $$SEARCH_META ban in sharded environments</title>
                <link>https://jira.mongodb.org/browse/DOCS-15256</link>
                <project id="10380" key="DOCS">Documentation</project>
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&lt;p&gt;    While this ticket does not change the promised behavior, it previously would have been possible to run certain search aggregation stages in sharded environments that would have returned incorrect results. This ticket correctly bans those pipelines, but some users may see their queries fail with the new error.&lt;/p&gt;

&lt;p&gt;The feature banned by this ticket is enabled in 6.0 &lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    If the feature flag is disabled, $$SEARCH_META should not be allowed on sharded collections. Currently this is accomplished &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/pipeline/expression.cpp#L2328&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here &lt;/a&gt; during runtime. We should change this to be checked earlier when detecting that we are in a sharded collection w/o the feature flag. &lt;/p&gt;
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                <environment></environment>
        <key id="2027889">DOCS-15256</key>
            <summary>[SERVER] Investigate changes in SERVER-63479: Correct $$SEARCH_META ban in sharded environments</summary>
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                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
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                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>backlog</label>
                            <label>feature</label>
                            <label>query</label>
                            <label>sharding</label>
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                <created>Tue, 19 Apr 2022 13:45:35 +0000</created>
                <updated>Mon, 22 Jan 2024 16:11:15 +0000</updated>
                                                            <fixVersion>5.0.8</fixVersion>
                    <fixVersion>5.3.1</fixVersion>
                    <fixVersion>4.4.15</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4588492" author="edu.bot" created="Wed, 1 Jun 2022 22:37:03 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63479&quot; title=&quot;Correct $$SEARCH_META ban in sharded environments&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63479&quot;&gt;&lt;del&gt;SERVER-63479&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
5.0.8, 5.3.1, 4.4.15&lt;/p&gt;</comment>
                            <comment id="4490897" author="JIRAUSER1257477" created="Tue, 19 Apr 2022 13:55:59 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63479&quot; title=&quot;Correct $$SEARCH_META ban in sharded environments&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63479&quot;&gt;&lt;del&gt;SERVER-63479&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
5.0.8, 5.3.1&lt;/p&gt;</comment>
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                            <customfieldvalue>While this ticket does not change the promised behavior, it previously would have been possible to run certain search aggregation stages in sharded environments that would have returned incorrect results. This ticket correctly bans those pipelines, but some users may see their queries fail with the new error.&lt;br/&gt;
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