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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-6493] Inserting array value for non-shard-key field used in prefix shard key index succeeds</title>
                <link>https://jira.mongodb.org/browse/SERVER-6493</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If you have an index on A,B and shard on A, inserting array values for B succeeds.  The discussion in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1506&quot; title=&quot;when sharding on a and need an index on a,b allow only a,b index&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1506&quot;&gt;&lt;del&gt;SERVER-1506&lt;/del&gt;&lt;/a&gt; suggests that this can cause problems.&lt;/p&gt;</description>
                <environment></environment>
        <key id="44589">SERVER-6493</key>
            <summary>Inserting array value for non-shard-key field used in prefix shard key index succeeds</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
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                <created>Tue, 17 Jul 2012 19:38:15 +0000</created>
                <updated>Wed, 15 Aug 2012 03:14:21 +0000</updated>
                            <resolved>Wed, 15 Aug 2012 03:14:20 +0000</resolved>
                                    <version>2.1.2</version>
                                                    <component>Index Maintenance</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="146307" author="matulef" created="Mon, 23 Jul 2012 20:49:26 +0000"  >&lt;p&gt;This is the intended behavior, for now, until multikey indexes are supported for sharding.  You are allowed to insert multikey values for B, you just won&apos;t be able to use the index for splitting/migrating if you do that.  You can recover from this state by creating an index on the shard key.&lt;/p&gt;

&lt;p&gt;The solution to this is to support multikey indexes, see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6095&quot; title=&quot;make multikey indices useful for sharding&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6095&quot;&gt;&lt;del&gt;SERVER-6095&lt;/del&gt;&lt;/a&gt;.  &lt;/p&gt;</comment>
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