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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>[SERVER-63244] Majority reads must round their read timestamp up to the oldest timestamp</title>
                <link>https://jira.mongodb.org/browse/SERVER-63244</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55030&quot; title=&quot;Remove mutexes that serialize secondary and majority read operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55030&quot;&gt;&lt;del&gt;SERVER-55030&lt;/del&gt;&lt;/a&gt; reduced the critical section of a mutex that prevented the oldest_timestamp from advancing past the majority-commit point when starting new reads with the kMajorityCommited ReadSource (i.e. readConcern: majority).&lt;/p&gt;

&lt;p&gt;There is a race now where the oldest timestamp can advance past the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ca8259ffef3ec2947ce6a5761f6c433e0e0c4663/src/mongo/db/storage/wiredtiger/wiredtiger_snapshot_manager.cpp#L83-L93&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;majority commit point before the read timestamp is set&lt;/a&gt;, resulting in a fassert.&lt;/p&gt;

&lt;p&gt;We should use the &quot;roundup_timestamps=(read=true)&quot; configuration when starting these transactions and then return the actual read timestamp by querying WT.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1976560">SERVER-63244</key>
            <summary>Majority reads must round their read timestamp up to the oldest timestamp</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="daniel.gomezferro@mongodb.com">Daniel Gomez Ferro</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                    </labels>
                <created>Thu, 3 Feb 2022 12:01:53 +0000</created>
                <updated>Sun, 29 Oct 2023 21:43:11 +0000</updated>
                            <resolved>Fri, 11 Feb 2022 18:06:28 +0000</resolved>
                                                    <fixVersion>5.3.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4350901" author="xgen-internal-githook" created="Fri, 11 Feb 2022 17:21:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel G&#243;mez Ferro&apos;, &apos;email&apos;: &apos;daniel.gomezferro@mongodb.com&apos;, &apos;username&apos;: &apos;dgomezferro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63244&quot; title=&quot;Majority reads must round their read timestamp up to the oldest timestamp&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63244&quot;&gt;&lt;del&gt;SERVER-63244&lt;/del&gt;&lt;/a&gt; Round up read timestamp for majority reads&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/89600c35511ce81a62ae235b27746a0698bdfef2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/89600c35511ce81a62ae235b27746a0698bdfef2&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1643191">SERVER-55030</issuekey>
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