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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-80904] Audit gFeatureFlagBucketUnpackWithSort</title>
                <link>https://jira.mongodb.org/browse/SERVER-80904</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This ticket has been split from an audit of all Query 7.0 feature flags. This ticket is a request to audit gFeatureFlagBucketUnpackWithSort.&lt;/p&gt;

&lt;p&gt;Intial sync can &lt;a href=&quot;https://github.com/10gen/mongo/blob/d13faac6def5a42bad3e1ac6d91d9d5ce805f0d2/src/mongo/db/repl/initial_syncer.cpp#L696&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;temporarily reset&lt;/a&gt; the fcv value to uninitialized and sets the new value afterwards. This can cause call sites trying to inspect the fcv value to hit &lt;a href=&quot;https://github.com/10gen/mongo/blob/07efe95e998e3f8305c4ec215761e0ec7b9e8012/src/mongo/db/server_options.h#L147&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this invariant&lt;/a&gt;. We need to audit feature flag usage and determine which should do one of the following:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;It can never be called when initial sync is running. So do nothing. Note that this can be tricky to prove as we once thought the catalog cache loader can never be run while initial sync is happening but it can.&lt;/li&gt;
	&lt;li&gt;It is safe to ignore fcv version so use isEnabledAndIgnoreFCVUnsafe instead&lt;/li&gt;
	&lt;li&gt;It is safe to turn off the feature anytime (even if feature flag is actually on) so use isEnabledUseDefaultFCVWhenUninitialized instead.&lt;/li&gt;
	&lt;li&gt;Special logic is needed if fcv is not initialized&lt;/li&gt;
&lt;/ul&gt;
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                <environment></environment>
        <key id="2437589">SERVER-80904</key>
            <summary>Audit gFeatureFlagBucketUnpackWithSort</summary>
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                                            <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>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Sep 2023 15:28:22 +0000</created>
                <updated>Sat, 9 Sep 2023 01:00:39 +0000</updated>
                            <resolved>Fri, 8 Sep 2023 15:33:42 +0000</resolved>
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