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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-56236] Disable sync source re-evaluation in oplog fetcher for tenant migrations</title>
                <link>https://jira.mongodb.org/browse/SERVER-56236</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In tenant migrations, we repurposed the OplogFetcher as our way of fetching oplog entries from the donor. However, the OplogFetcher contains some additional logic to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b1f65c29872abfe0111559a8be6ff209ecf18ade/src/mongo/db/repl/oplog_fetcher.cpp#L756-L757&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;check if we should stop syncing from the current sync source&lt;/a&gt;. These checks compare our current sync source to other members of our replica set. As a result, we may shut down the oplog fetcher for reasons such as syncing from a closer member, but in reality the recipient service would be forced to restart on these errors and select another donor host. We should probably disable any non-relevant checks when we are running the OplogFetcher from tenant migrations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1685852">SERVER-56236</key>
            <summary>Disable sync source re-evaluation in oplog fetcher for tenant migrations</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="13202">Works as Designed</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="xuerui.fa@mongodb.com">Xuerui Fa</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Apr 2021 16:37:50 +0000</created>
                <updated>Fri, 27 Oct 2023 13:52:25 +0000</updated>
                            <resolved>Wed, 21 Apr 2021 19:57:59 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3731403" author="xuerui.fa" created="Wed, 21 Apr 2021 19:57:43 +0000"  >&lt;p&gt;Lingzhi discovered that this is already being handled inside of the recipient. We create a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5b59e8b94977a94ce5a3fc066061ac34fa087e83/src/mongo/db/repl/tenant_migration_recipient_service.cpp#L193-L200&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;DataReplicatorExternalState&lt;/tt&gt; and mock out many of its functions&lt;/a&gt;, including &lt;tt&gt;shouldStopFetching&lt;/tt&gt;. So we should never run into this problem for Tenant Migrations. Closing this ticket!&lt;/p&gt;</comment>
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