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    <title>MongoDB Jira</title>
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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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<item>
            <title>[SERVER-65702] upgradeCluster in multi_cluster.js incorrectly used to downgrade sharded clusters</title>
                <link>https://jira.mongodb.org/browse/SERVER-65702</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, we seem to use &lt;a href=&quot;https://github.com/10gen/mongo/blob/54e6bf673545dfab475ed5586d3b8286cf94f9ab/jstests/multiVersion/libs/multi_cluster.js#L24&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;upgradeCluster&lt;/a&gt; to double as downgrade by passing in a downgraded version (&lt;a href=&quot;https://github.com/10gen/mongo/blob/54e6bf673545dfab475ed5586d3b8286cf94f9ab/jstests/multiVersion/genericChangeStreams/change_streams_read_oplog_after_downgrade.js#L290&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;example&lt;/a&gt;). However, our documented downgrade procedures indicate that the order in which we restart the binaries should be the reverse of the upgrade procedure:&lt;br/&gt;
For upgrade, we restart in order of config servers -&amp;gt; shards -&amp;gt; mongos&lt;br/&gt;
For downgrade, we restart in order of mongos -&amp;gt; shards -&amp;gt; config servers.&lt;/p&gt;

&lt;p&gt;For this ticket, we should create a separate downgradeCluster helper and make sure each reference to upgradeCluster(downgradeVersion) is updated appropriately.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2026193">SERVER-65702</key>
            <summary>upgradeCluster in multi_cluster.js incorrectly used to downgrade sharded clusters</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="sanika.phanse@mongodb.com">Sanika Phanse</assignee>
                                    <reporter username="jason.chan@mongodb.com">Jason Chan</reporter>
                        <labels>
                            <label>sharding-nyc-subteam3</label>
                    </labels>
                <created>Fri, 15 Apr 2022 15:32:11 +0000</created>
                <updated>Sun, 29 Oct 2023 21:39:22 +0000</updated>
                            <resolved>Tue, 3 May 2022 19:04:44 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4521312" author="xgen-internal-githook" created="Mon, 2 May 2022 22:57:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sanika Phanse&apos;, &apos;email&apos;: &apos;sanika.phanse@mongodb.com&apos;, &apos;username&apos;: &apos;sphanse99&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65702&quot; title=&quot;upgradeCluster in multi_cluster.js incorrectly used to downgrade sharded clusters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65702&quot;&gt;&lt;del&gt;SERVER-65702&lt;/del&gt;&lt;/a&gt; upgradeCluster in multi_cluster.js incorrectly used to downgrade sharded clusters.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/eea1c78a009e0d477a825674dbf41e83afa4970b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/eea1c78a009e0d477a825674dbf41e83afa4970b&lt;/a&gt;&lt;/p&gt;</comment>
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