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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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<item>
            <title>[COMPASS-7184] Investigate changes in SERVER-80498: Improve thread safety of ReadConcernArgs modification</title>
                <link>https://jira.mongodb.org/browse/COMPASS-7184</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    $currentOp output for multi-document transactions used to display the actual readConcern being used. In some cases this could lead to intermittent instances of an operation displaying a different readConcern than the user-provided due to internal operations that temporarily changed it.&lt;/p&gt;

&lt;p&gt;With the merged ticket, $currentOp will now display the user-provided readConcern without the possibility of intermittent changes. &lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    There is a harmless race between a thread performing an operation using DBDirectClient that temporarily resets the ReadConcernArgs (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2674b6d474f5eabde5eb44e6a8396ccb6d6fc53/src/mongo/db/transaction/transaction_participant.cpp#L284&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;example&lt;/a&gt;) and the currentOps method reading the ReadConcernArgs of the target operation (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2674b6d474f5eabde5eb44e6a8396ccb6d6fc53/src/mongo/db/transaction/transaction_participant.cpp#L2552&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;code&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;The main risk potential for this is an operation printing potentially wrong information for the read concern used. This would occur if the currentOp thread acquired a copy of the data while the temporary reset was happening.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2433447">COMPASS-7184</key>
            <summary>Investigate changes in SERVER-80498: Improve thread safety of ReadConcernArgs modification</summary>
                <type id="10501" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Investigation</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="-1">Unassigned</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Mon, 4 Sep 2023 10:16:25 +0000</created>
                <updated>Mon, 29 Jan 2024 12:54:50 +0000</updated>
                            <resolved>Mon, 29 Jan 2024 12:54:50 +0000</resolved>
                                                    <fixVersion>No version</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="6048670" author="JIRAUSER1256529" created="Mon, 29 Jan 2024 12:54:50 +0000"  >&lt;p&gt;No discernible impact&lt;/p&gt;</comment>
                            <comment id="5677633" author="dbeng-pm-bot" created="Mon, 4 Sep 2023 10:16:28 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80498&quot; title=&quot;Improve thread safety of ReadConcernArgs modification&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80498&quot;&gt;&lt;del&gt;SERVER-80498&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
7.2.0-rc0&lt;/p&gt;</comment>
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