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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[DOCS-16476] Incorrect resharding limitation about not allowing resharding on collections with a uniqueness constraint</title>
                <link>https://jira.mongodb.org/browse/DOCS-16476</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Our &lt;a href=&quot;https://www.mongodb.com/docs/manual/core/sharding-reshard-a-collection/#limitations&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;resharding docs say&lt;/a&gt;:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;Resharding a collection that has a&#160;&lt;a href=&quot;https://www.mongodb.com/docs/manual/core/index-unique/#std-label-index-type-unique&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;uniqueness&lt;/a&gt; constraint is not supported&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;This isn&apos;t quite true. Resharding requires that all existing unique indexes can be supported by the new shard key, using the same rules as shardCollection. So a collection with a uniqueness constraint &lt;em&gt;can&lt;/em&gt; be resharded as long as that existing constraint is still satisfied &lt;a href=&quot;https://www.mongodb.com/docs/v7.0/core/sharding-shard-key/#unique-indexes&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;per the rules here.&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2490743">DOCS-16476</key>
            <summary>Incorrect resharding limitation about not allowing resharding on collections with a uniqueness constraint</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="nick.villahermosa@mongodb.com">Nick Villahermosa</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                            <label>bugfix</label>
                            <label>quick-win</label>
                            <label>request</label>
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                <created>Fri, 3 Nov 2023 20:46:17 +0000</created>
                <updated>Wed, 6 Dec 2023 15:35:09 +0000</updated>
                            <resolved>Thu, 16 Nov 2023 16:37:18 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231120</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5885748" author="JIRAUSER1270643" created="Thu, 16 Nov 2023 16:37:18 +0000"  >&lt;p&gt;Backports: 7.0, 6.0, 5.0&lt;/p&gt;</comment>
                            <comment id="5857627" author="JIRAUSER1260472" created="Mon, 6 Nov 2023 16:18:24 +0000"  >&lt;p&gt;Thanks for flagging this issue, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jack.mulrow%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;jack.mulrow@mongodb.com&quot;&gt;jack.mulrow@mongodb.com&lt;/a&gt;. We&apos;re expecting to pickup and complete this work soon!&lt;/p&gt;</comment>
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