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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-74936] Improve shard key index inconsistency checks during migrations</title>
                <link>https://jira.mongodb.org/browse/SERVER-74936</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;With actual implementation of the shard key index inconsistency checks, if we are running the checkMetadataConsistency cmd in a recipient shard part of a migration, and that shard had no chunks about the collection being migrated (chunk version &amp;lt;0,0&amp;gt;), we will skip the checks.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/be31cc047874ed3c6854534bf419021655535034/src/mongo/db/s/metadata_consistency_util.cpp#L230-L249&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/be31cc047874ed3c6854534bf419021655535034/src/mongo/db/s/metadata_consistency_util.cpp#L230-L249&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;This is done because there is a space where the collection is registered on the recipient&apos;s shard but it has no indexes yet.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/be31cc047874ed3c6854534bf419021655535034/src/mongo/db/s/migration_destination_manager.cpp#L1079&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/be31cc047874ed3c6854534bf419021655535034/src/mongo/db/s/migration_destination_manager.cpp#L1079&lt;/a&gt;&#160;&lt;/p&gt;

&lt;p&gt;The goal of this ticket is to investigate if there is a more optimized way of checking shard key indexes when there are migrations.&lt;/p&gt;

&lt;p&gt;A possible optimistic approach was to first check if the shard key index exists, and if not check if there is a migration running.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2289699">SERVER-74936</key>
            <summary>Improve shard key index inconsistency checks during migrations</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-sharding-emea">[DO NOT USE] Backlog - Sharding EMEA</assignee>
                                    <reporter username="pol.pinol@mongodb.com">Pol Pinol</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 Mar 2023 09:12:35 +0000</created>
                <updated>Thu, 23 Mar 2023 13:04:37 +0000</updated>
                            <resolved>Thu, 23 Mar 2023 13:04:28 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
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            <issuekey id="2234556">SERVER-72895</issuekey>
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