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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-37523] Call supportsReadConcern for all commands in mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-37523</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently mongos only checks &lt;tt&gt;supportsReadConcern()&lt;/tt&gt; for a command &lt;a href=&quot;https://github.com/mongodb/mongo/blob/3dc5e5979bc9a4a/src/mongo/s/commands/strategy.cpp#L372-L375&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;when it is received with snapshot level read concern&lt;/a&gt;, otherwise deferring the check to mongod. As mongos starts to make more decisions based on read concern (e.g. global snapshot timestamp selection) and for consistency of validation, we should consider always performing this check on mongos instead. This would require verifying / adding correct &lt;tt&gt;supportsReadConcern()&lt;/tt&gt; definitions for each cluster command.&lt;/p&gt;</description>
                <environment></environment>
        <key id="616017">SERVER-37523</key>
            <summary>Call supportsReadConcern for all commands in mongos</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-cluster-scalability">Backlog - Cluster Scalability</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                            <label>MaxH</label>
                            <label>ShardedTxn:RouterSupport</label>
                            <label>ShardingTechDebt</label>
                            <label>cs-subteam1</label>
                            <label>neweng</label>
                            <label>sharding-nyc-subteam1</label>
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                <created>Tue, 9 Oct 2018 13:53:03 +0000</created>
                <updated>Tue, 12 Dec 2023 17:03:16 +0000</updated>
                                                                            <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="4947645" author="max.hirschhorn@10gen.com" created="Wed, 2 Nov 2022 13:16:28 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58176&quot; title=&quot;Mongos does not validate readConcern on insert/update/delete commands&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58176&quot;&gt;&lt;del&gt;SERVER-58176&lt;/del&gt;&lt;/a&gt; may have only address this for the insert, update, and delete commands. It is worth double checking what additional work is needed to make the read concern validation consistent between mongos and mongod.&lt;/p&gt;</comment>
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