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    <title>MongoDB Jira</title>
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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-73210] Fix concurrency bug in OplogStones</title>
                <link>https://jira.mongodb.org/browse/SERVER-73210</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If a truncate of the oplog occurs (&lt;br/&gt;
&lt;tt&gt;WiredTigerRecordStore::OplogStones::clearStonesOnCommit)&lt;/tt&gt;, it first: * Sets the number of current records and bytes for the new OplogStone to 0&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Acquires the modification mutex&lt;/li&gt;
	&lt;li&gt;Clears the stones list&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Modifying the first two variable outside of the lock could potentially lead to an invalid state since other OplogStones modifications first take the mutex then perform the other modifications.&lt;/p&gt;

&lt;p&gt;We should protect the first two variables under the mutex to avoid potential invalid states. The attached patch fixes this.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2240725">SERVER-73210</key>
            <summary>Fix concurrency bug in OplogStones</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="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</assignee>
                                    <reporter username="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Mon, 23 Jan 2023 17:32:16 +0000</created>
                <updated>Sun, 29 Oct 2023 21:27:35 +0000</updated>
                            <resolved>Fri, 27 Jan 2023 10:11:20 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5145436" author="xgen-internal-githook" created="Fri, 27 Jan 2023 10:04:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Olivares Provencio&apos;, &apos;email&apos;: &apos;jordi.olivares-provencio@mongodb.com&apos;, &apos;username&apos;: &apos;jordiolivares&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73210&quot; title=&quot;Fix concurrency bug in OplogStones&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73210&quot;&gt;&lt;del&gt;SERVER-73210&lt;/del&gt;&lt;/a&gt; Modify OplogStones atomics under the lock when clearing&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/183324bafa4753b04cd860b6f7110b8d604e87bb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/183324bafa4753b04cd860b6f7110b8d604e87bb&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="427393" name="diff.patch" size="769" author="jordi.olivares-provencio@mongodb.com" created="Mon, 23 Jan 2023 17:31:59 +0000"/>
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