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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-48941] [recovery] Make startup recovery recover a tenant migration donor&apos;s in-memory state</title>
                <link>https://jira.mongodb.org/browse/SERVER-48941</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This ticket is to make mongod recover on startup which database prefixes to block/reject operations for.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Add a function void recoverTenantMigrationAccessBlockers(OperationContext* opCtx) to migrating_tenant_donor_util.cpp that scans config.migrationDonors (see&lt;a href=&quot;https://github.com/mongodb/mongo/blob/5ad9593661aacb7cea228c78723e93c61031b67f/src/mongo/db/s/migration_util.cpp#L793-L796&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&#160;example&lt;/a&gt;), and for each doc:
	&lt;ul&gt;
		&lt;li&gt;Creates a TenantMigrationAccessBlocker for that &#8220;databasePrefix&#8221; and add()&apos;s it to TenantMigrationAccessBlockerByPrefix&lt;/li&gt;
		&lt;li&gt;If the doc has &quot;blockTimestamp&quot; set, call startBlockingWrites() and then startBlockingReadsAfter() with the &#8220;blockTimestamp&#8221; on the TenantMigrationAccessBlocker&lt;/li&gt;
		&lt;li&gt;If the doc&apos;s state is &#8220;commit&#8221; , also call commit() on the TenantMigrationAccessBlocker&lt;/li&gt;
		&lt;li&gt;If the doc&apos;s state is &#8220;abort&#8221; , also call abort() on the TenantMigrationAccessBlocker&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Call the new recoverTenantMigrationAccessBlockers function just before &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6a5d7ae10752697f06d71d6d8c898d7e0f0244bb/src/mongo/db/repl/replication_recovery.cpp#L397&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;where&lt;/a&gt; prepared transactions are recovered on startup&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This ticket should also test that the code works by restarting the donor&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;while the migration is in the &quot;blocking&quot; state&lt;/li&gt;
	&lt;li&gt;after the migration has committed&lt;/li&gt;
	&lt;li&gt;after the migration has aborted&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;and confirming that the in-memory state was recovered correctly. See&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/6a5d7ae10752697f06d71d6d8c898d7e0f0244bb/jstests/replsets/tenant_migration_donor_state_machine.js#L80&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;tenant_migration_donor_state_machine.js&lt;/a&gt; for an example of pausing a migration while it&apos;s blocking and checking the donor&apos;s in-memory state.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1383377">SERVER-48941</key>
            <summary>[recovery] Make startup recovery recover a tenant migration donor&apos;s in-memory state</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="jason.zhang@mongodb.com">Jason Zhang</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                            <label>pm-1791_milestone-D</label>
                    </labels>
                <created>Thu, 18 Jun 2020 03:49:56 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:49 +0000</updated>
                            <resolved>Fri, 18 Sep 2020 01:32:45 +0000</resolved>
                                                    <fixVersion>4.8.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3400258" author="xgen-internal-githook" created="Fri, 18 Sep 2020 01:27:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Zhang&apos;, &apos;email&apos;: &apos;jason.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;jz1242&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48941&quot; title=&quot;[recovery] Make startup recovery recover a tenant migration donor&amp;#39;s in-memory state&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48941&quot;&gt;&lt;del&gt;SERVER-48941&lt;/del&gt;&lt;/a&gt; Make startup recovery recover a tenant migration donor&apos;s in-memory state&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7689c2c8eeb1ea118ce12c544befef31c2bafa67&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7689c2c8eeb1ea118ce12c544befef31c2bafa67&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1449280">SERVER-50466</issuekey>
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