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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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            <title>[SERVER-82087] FCVServerStatusMetrics::generateSection is racy</title>
                <link>https://jira.mongodb.org/browse/SERVER-82087</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is the same root issue as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79274&quot; title=&quot;FCV checks can be racy if FCV is uninitialized in between the checks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79274&quot;&gt;&lt;del&gt;SERVER-79274&lt;/del&gt;&lt;/a&gt;. This method performs an initial check that FCV is initialized and later on attempts to get the FCV. But it&apos;s possible for the FCV to get unset in between those calls, e.g. if we are in initial sync (as seen in BF-30375) leading us to hit an invariant. &lt;/p&gt;</description>
                <environment></environment>
        <key id="2471779">SERVER-82087</key>
            <summary>FCVServerStatusMetrics::generateSection is racy</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="kaitlin.mahar@mongodb.com">Kaitlin Mahar</reporter>
                        <labels>
                    </labels>
                <created>Wed, 11 Oct 2023 15:20:00 +0000</created>
                <updated>Mon, 16 Oct 2023 18:21:06 +0000</updated>
                            <resolved>Mon, 16 Oct 2023 18:21:06 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5770967" author="kaitlin.mahar" created="Wed, 11 Oct 2023 16:31:12 +0000"  >&lt;p&gt;To capture some conversation from Slack: we think one acceptable fix in this case would be to use some new helper that atomically checks if the FCV is initialized and returns it if so, and to update this function to 1) only include the FCV info if that helper returned non-null and 2) use that same returned value throughout the function rather than re-obtaining it. This is for serverStatus and so it is ok if there is some staleness in the data by the time the function exits; FTDC only collects serverStatus every 1 second so it is bound to be stale regardless. &lt;/p&gt;</comment>
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