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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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<item>
            <title>[SERVER-79269] Invariant that we don&apos;t check FCV in oplog application</title>
                <link>https://jira.mongodb.org/browse/SERVER-79269</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Oplog application should do exactly what the primary does, and not check FCV. FCV should only be checked on the primary. We should be able to invariant that FCV is only checked on primary nodes. This should make code like &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49748&quot; title=&quot;Initial sync should clone admin.system.version before any other collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49748&quot;&gt;&lt;del&gt;SERVER-49748&lt;/del&gt;&lt;/a&gt; unnecessary. If in adding this invariant we discover places where we check FCV, we should understand why they do so and correct them.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2399520">SERVER-79269</key>
            <summary>Invariant that we don&apos;t check FCV in oplog application</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="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                    </labels>
                <created>Mon, 24 Jul 2023 19:16:48 +0000</created>
                <updated>Mon, 21 Aug 2023 18:10:49 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5633129" author="judah.schvimer" created="Mon, 14 Aug 2023 18:27:20 +0000"  >&lt;p&gt;In triage 2 concerns came up:&lt;br/&gt;
1. Some changes to how we generate implicitly replicated data could require FCV checks.&lt;br/&gt;
2. If a feature flag on the primary requires checking FCV, and the secondary code passes through the feature flag, it will also check FCV (even though it&apos;s unnecessary). We would need to provide a way to bypass that FCV check on the secondary, or make sure all feature flags that gate on FCV are checked outside of the secondary oplog application path.&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1415095">SERVER-49748</issuekey>
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            <issuelink>
            <issuekey id="585021">SERVER-36498</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2151296">SERVER-70202</issuekey>
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            <issuelink>
            <issuekey id="2400400">SERVER-79317</issuekey>
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