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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-34019] Downgrade global snapshot reads</title>
                <link>https://jira.mongodb.org/browse/SERVER-34019</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Verify that during downgrade commands with readConcern level:snapshot are rejected.&lt;/p&gt;

&lt;p&gt;Summary:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Verify that snapshot read concern is accepted when the cluster is fully upgraded, in both FCV 4.0 and 3.6, then disallowed as soon as mongos is downgraded and at every downgrade stage after.&lt;/li&gt;
&lt;/ul&gt;



&lt;p&gt;Design:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Invert &lt;tt&gt;jstests/multiversion/global_snapshot_reads_upgrade_cluster.js&lt;/tt&gt; to downgrade a cluster instead, and add assertions on the behavior of snapshot reads at each stage.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="514215">SERVER-34019</key>
            <summary>Downgrade global snapshot reads</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="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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="misha.tyulenev@mongodb.com">Misha Tyulenev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 20 Mar 2018 22:36:04 +0000</created>
                <updated>Sun, 29 Oct 2023 22:33:31 +0000</updated>
                            <resolved>Wed, 28 Mar 2018 23:05:05 +0000</resolved>
                                                    <fixVersion>3.7.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1848499" author="xgen-internal-githook" created="Wed, 28 Mar 2018 22:18:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34019&quot; title=&quot;Downgrade global snapshot reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34019&quot;&gt;&lt;del&gt;SERVER-34019&lt;/del&gt;&lt;/a&gt; Test global snapshot reads downgrade behavior&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2e1542e518b6df660bb3a4c1ce0020c293b928b5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2e1542e518b6df660bb3a4c1ce0020c293b928b5&lt;/a&gt;&lt;/p&gt;</comment>
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