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    <description>This file is an XML representation of an issue</description>
    <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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<item>
            <title>[SERVER-54920] Move the tenant migration recipient MTAB lifetime earlier</title>
                <link>https://jira.mongodb.org/browse/SERVER-54920</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is needed to close the corner case of TTL cleanup in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53768&quot; title=&quot;Block TTL deletions on tenant being migrated on recipient until the migration is forgotten&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53768&quot;&gt;&lt;del&gt;SERVER-53768&lt;/del&gt;&lt;/a&gt;. The TTL cycle is suspended in presence of MTAB, but today MTAB is created only when the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8cfccd21f2f06bf93345ad25b3ca0a9af489b0e2/src/mongo/db/repl/tenant_migration_recipient_op_observer.cpp#L115-L119&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;1st clone is done&lt;/a&gt;. This will allow to keep the TTL logic very simple.&lt;/p&gt;

&lt;p&gt;Caveat, as discussed:&lt;br/&gt;
&quot;Matthew Russotto:&lt;br/&gt;
If we create the mtab early we will need to make sure when we read the local database that we set the tenantMigration flag on the opCtx (we don&apos;t do that now, I don&apos;t think).  The cloner needs to write; if it has that flag set when it does, its oplog writes will have the migration UUID (not sure if that&apos;s a problem, though), so if we don&apos;t want it do, we&apos;ll need to add some bits.&quot;&lt;/p&gt;

&lt;p&gt;&quot;Lingzhi Deng: &lt;br/&gt;
I dont think we need to worry about other writes. But I agree with Matthew that we will need to be careful with reads from the cloner, e.g. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8cfccd21f2f06bf93345ad25b3ca0a9af489b0e2/src/mongo/db/repl/tenant_collection_cloner.cpp#L325-L357&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/8cfccd21f2f06bf93345ad25b3ca0a9af489b0e2/src/mongo/db/repl/tenant_collection_cloner.cpp#L325-L357&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;To do that, we could set tenantMigrationRecipientInfo(opCtx) on the opCtx and exempt that in the recipient mtab&quot;&lt;/p&gt;
</description>
                <environment></environment>
        <key id="1638271">SERVER-54920</key>
            <summary>Move the tenant migration recipient MTAB lifetime earlier</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="lingzhi.deng@mongodb.com">Lingzhi Deng</assignee>
                                    <reporter username="andrew.shuvalov@mongodb.com">Andrew Shuvalov</reporter>
                        <labels>
                            <label>pm-1791_milestone-B</label>
                    </labels>
                <created>Wed, 3 Mar 2021 17:15:18 +0000</created>
                <updated>Sun, 29 Oct 2023 21:56:46 +0000</updated>
                            <resolved>Thu, 18 Mar 2021 00:29:37 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3670383" author="xgen-internal-githook" created="Thu, 18 Mar 2021 00:09:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Lingzhi Deng&apos;, &apos;email&apos;: &apos;lingzhi.deng@mongodb.com&apos;, &apos;username&apos;: &apos;ldennis&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54920&quot; title=&quot;Move the tenant migration recipient MTAB lifetime earlier&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54920&quot;&gt;&lt;del&gt;SERVER-54920&lt;/del&gt;&lt;/a&gt;: Move the tenant migration recipient MTAB lifetime earlier&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3afa5f4fde94a47d8d3ca3743954216c8342f32d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3afa5f4fde94a47d8d3ca3743954216c8342f32d&lt;/a&gt;&lt;/p&gt;</comment>
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