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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-34381] 3.6 Majority read concern can read data mid-rollback</title>
                <link>https://jira.mongodb.org/browse/SERVER-34381</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In 3.6, we do not prevent majority reads at a timestamp between the common point and reaching minValid. The data is inconsistent during this period of time, so we should not service reads that use timestamps during this period. This is only a problem for rollback via refetch. &lt;/p&gt;</description>
                <environment></environment>
        <key id="524124">SERVER-34381</key>
            <summary>3.6 Majority read concern can read data mid-rollback</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="13202">Works as Designed</resolution>
                                        <assignee username="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                    </labels>
                <created>Mon, 9 Apr 2018 14:31:31 +0000</created>
                <updated>Fri, 27 Oct 2023 13:53:52 +0000</updated>
                            <resolved>Wed, 18 Apr 2018 19:28:33 +0000</resolved>
                                    <version>3.6.3</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1868033" author="spencer" created="Wed, 18 Apr 2018 19:28:14 +0000"  >&lt;p&gt;In 3.6 we maintain a list of _stableTimestampCandidates which only get set to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/079bae40868cc2e4e22330b41692fd07eb498621/src/mongo/db/repl/replication_coordinator_impl.cpp#L1146&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;optimes that are consistent&lt;/a&gt; (i.e. when we&apos;re &lt;a href=&quot;https://github.com/mongodb/mongo/blob/079bae40868cc2e4e22330b41692fd07eb498621/src/mongo/db/repl/sync_tail.cpp#L921&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;not less than our minvalid&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;We then only &lt;a href=&quot;https://github.com/mongodb/mongo/blob/079bae40868cc2e4e22330b41692fd07eb498621/src/mongo/db/repl/replication_coordinator_impl.cpp#L3288&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;update our committed snapshot&lt;/a&gt; (which is what we use to serve majority reads) to stable timestamp candidates.&lt;/p&gt;

&lt;p&gt;So I think we&apos;re safe from this.&lt;/p&gt;</comment>
                            <comment id="1862782" author="greg.mckeon" created="Thu, 12 Apr 2018 18:11:14 +0000"  >&lt;p&gt;This may be a problem for majority readConcern on the inmemory storage engine in 4.0 as well.&lt;/p&gt;</comment>
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