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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-61356] investigate condition in collMod unique index conversion code during tenant migration for duplicate checks</title>
                <link>https://jira.mongodb.org/browse/SERVER-61356</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When collMod is converting an index to unique, it needs to scan the index for duplicates before proceeding with the conversion. In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61159&quot; title=&quot;Check for duplicates before converting a non-unique index to unique&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61159&quot;&gt;&lt;del&gt;SERVER-61159&lt;/del&gt;&lt;/a&gt;, we determine if it is possible to skip this check based on the current oplog application mode. Since tenant migration and initial sync present the same mode to the collMod implementation, we should investigate if it is still safe to skip the duplicate checking in the tenant migration case.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1921536">SERVER-61356</key>
            <summary>investigate condition in collMod unique index conversion code during tenant migration for duplicate checks</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="9">Done</resolution>
                                        <assignee username="shinyee.tan@mongodb.com">Shin Yee Tan</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
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                <created>Tue, 9 Nov 2021 16:55:17 +0000</created>
                <updated>Tue, 8 Feb 2022 00:09:05 +0000</updated>
                            <resolved>Mon, 7 Feb 2022 21:27:57 +0000</resolved>
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                            <comment id="4341018" author="xgen-internal-githook" created="Tue, 8 Feb 2022 00:09:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Shin Yee Tan&apos;, &apos;email&apos;: &apos;shinyee.tan@mongodb.com&apos;, &apos;username&apos;: &apos;shinyeet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61356&quot; title=&quot;investigate condition in collMod unique index conversion code during tenant migration for duplicate checks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61356&quot;&gt;&lt;del&gt;SERVER-61356&lt;/del&gt;&lt;/a&gt; Modify comment to explain condition in collMod unique index conversion code during tenant migration for duplicate checks&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/60474aa14a6488889ec73c8760f3d907a28fec3a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/60474aa14a6488889ec73c8760f3d907a28fec3a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4340686" author="JIRAUSER1262267" created="Mon, 7 Feb 2022 21:27:57 +0000"  >&lt;p&gt;It is safe to skip the duplicate check in the tenant migration case because we assume the source cluster will have performed the check. When the oplog application mode is kInitialSync on the destination cluster, we can skip checking.&lt;/p&gt;</comment>
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