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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-77084] Investigate swapLockState() usage</title>
                <link>https://jira.mongodb.org/browse/SERVER-77084</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are places in the code were the Locker attached to the OperationContext is &lt;a href=&quot;https://github.com/mongodb/mongo/blame/95095d506bedfccb3895b0aa434eaa03870e07fd/src/mongo/db/transaction/transaction_participant.cpp#L1306&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;swapped out&lt;/a&gt; in favor of another.&lt;/p&gt;

&lt;p&gt;In the codebase, there is a common pattern of &lt;a href=&quot;https://github.com/10gen/mongo/blob/d4e78b7d757ccf1225bcd87d44ade39d1ce38586/src/mongo/db/concurrency/locker.h#L605-L775&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;RAII-style classes&lt;/a&gt;&#160; which execute scoped modifications to the Locker&apos;s state. A raw pointer to the Locker is stored in the constructor so the destructor can restore the Locker&apos;s original value.&lt;/p&gt;

&lt;p&gt;However, suppose the Locker is swapped out and discarded for a new Locker within the scope of one of these RAII-style classes. There is a risk of trying to &lt;a href=&quot;https://github.com/10gen/mongo/blob/d4e78b7d757ccf1225bcd87d44ade39d1ce38586/src/mongo/db/concurrency/locker.h#L741&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;use a pointer to a deleted object&lt;/a&gt; in the destructor.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2339504">SERVER-77084</key>
            <summary>Investigate swapLockState() usage</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="9">Done</resolution>
                                        <assignee username="haley.connelly@mongodb.com">Haley Connelly</assignee>
                                    <reporter username="haley.connelly@mongodb.com">Haley Connelly</reporter>
                        <labels>
                            <label>techdebt</label>
                    </labels>
                <created>Fri, 12 May 2023 15:56:36 +0000</created>
                <updated>Fri, 29 Sep 2023 14:34:12 +0000</updated>
                            <resolved>Fri, 29 Sep 2023 14:34:12 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>8</watches>
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            <issuekey id="2286593">SERVER-74781</issuekey>
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