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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-43338] [4.2] Dropping an admin.system.* index in FCV 4.0 can invariant on startup</title>
                <link>https://jira.mongodb.org/browse/SERVER-43338</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Dropping an admin.system.* index while in FCV 4.0 can hit &lt;a href=&quot;https://github.com/mongodb/mongo/blob/81d2b80554331f1ca428138823d27cbf2a293c52/src/mongo/db/index_builds_coordinator.cpp#L913-L914&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this invariant&lt;/a&gt; on startup.&lt;/p&gt;

&lt;p&gt;This invariant is not true in FCV 4.0 because &lt;a href=&quot;https://github.com/mongodb/mongo/blob/febbdd2456ab8e4526b8f1fa34f50989791216a1/src/mongo/db/catalog/multi_index_block.cpp#L220&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;hybrid indexes are only enabled in FCV 4.2&lt;/a&gt;, so all indexes built during startup recovery will be built in the foreground. We should remove the invariant altogether.&lt;/p&gt;</description>
                <environment></environment>
        <key id="926764">SERVER-43338</key>
            <summary>[4.2] Dropping an admin.system.* index in FCV 4.0 can invariant on startup</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="daniel.hatcher@mongodb.com">Danny Hatcher</reporter>
                        <labels>
                    </labels>
                <created>Fri, 13 Sep 2019 21:57:26 +0000</created>
                <updated>Sun, 29 Oct 2023 22:17:11 +0000</updated>
                            <resolved>Wed, 23 Oct 2019 18:25:24 +0000</resolved>
                                    <version>4.2.0</version>
                                    <fixVersion>4.2.2</fixVersion>
                                    <component>Index Maintenance</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2497934" author="xgen-internal-githook" created="Wed, 23 Oct 2019 18:02:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;louiswilliams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;name&apos;: &apos;Louis Williams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43338&quot; title=&quot;[4.2] Dropping an admin.system.* index in FCV 4.0 can invariant on startup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43338&quot;&gt;&lt;del&gt;SERVER-43338&lt;/del&gt;&lt;/a&gt; Dropping an admin.system.* index in FCV 4.0 can invariant on startup&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/38b546849312f7ef7969d80d9e5d31932906a38f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/38b546849312f7ef7969d80d9e5d31932906a38f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2495892" author="louis.williams" created="Tue, 22 Oct 2019 18:35:05 +0000"  >&lt;p&gt;Updating to reflect that this change only needs to made on the 4.2 branch.&lt;/p&gt;</comment>
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