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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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            <title>[SERVER-86275] Investigate banning majority readConcern on sharding catalog access</title>
                <link>https://jira.mongodb.org/browse/SERVER-86275</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-85869&quot; title=&quot;Exhaustive find on config shard can return stale data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-85869&quot;&gt;SERVER-85869&lt;/a&gt; we investigated the possibility of banning majority readConcern from the sharding catalog reads. This is a result of having seen multiple failures that had to be addressed due to reading faulty data.&lt;/p&gt;

&lt;p&gt;One case is &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54874&quot; title=&quot;Ensure reading of consistent config.collections and config.chunks when refreshing the CatalogCache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54874&quot;&gt;&lt;del&gt;SERVER-54874&lt;/del&gt;&lt;/a&gt; in which chunks were wrongly being read with majority readConcern, leading to invalid data being returned. Another is &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75490&quot; title=&quot;Use kSnapshotReadConcern when getting chunks from config server at checkMetadataConsistency&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75490&quot;&gt;&lt;del&gt;SERVER-75490&lt;/del&gt;&lt;/a&gt; which had the same issue but now for the &lt;tt&gt;checkMetadataConsistency&lt;/tt&gt; command.&lt;/p&gt;

&lt;p&gt;Considering that the snapshot model is simpler to understand than majority reads we should investigate whether it makes sense to ban majority reads in favor of snapshot ones.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2568402">SERVER-86275</key>
            <summary>Investigate banning majority readConcern on sharding catalog access</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="12452" iconUrl="https://jira.mongodb.org/images/icons/statuses/generic.png" description="">Needs Scheduling</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</reporter>
                        <labels>
                    </labels>
                <created>Tue, 6 Feb 2024 15:10:25 +0000</created>
                <updated>Wed, 7 Feb 2024 01:01:29 +0000</updated>
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