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    <title>MongoDB Jira</title>
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    <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-52763] Making StaleShardVersion use the new versions with timestamps</title>
                <link>https://jira.mongodb.org/browse/SERVER-52763</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="1539044">SERVER-52763</key>
            <summary>Making StaleShardVersion use the new versions with timestamps</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="sergi.mateo-bellido@mongodb.com">Sergi Mateo Bellido</assignee>
                                    <reporter username="sergi.mateo-bellido@mongodb.com">Sergi Mateo Bellido</reporter>
                        <labels>
                            <label>PM-1965-Milestone-0-Metadata-Format</label>
                    </labels>
                <created>Wed, 11 Nov 2020 13:38:10 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:36 +0000</updated>
                            <resolved>Fri, 26 Feb 2021 11:08:17 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3636678" author="JIRAUSER1256927" created="Fri, 26 Feb 2021 11:07:58 +0000"  >&lt;p&gt;Nothing to do in this ticket because:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;A &lt;tt&gt;StaleConfigInfo&lt;/tt&gt; has a &lt;tt&gt;ChunkVersion&lt;/tt&gt; and the &lt;tt&gt;ChunkVersion&lt;/tt&gt; class was extended with a &lt;tt&gt;Timestamp&lt;/tt&gt; field in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53093&quot; title=&quot;Add timestamp to ChunkVersion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53093&quot;&gt;&lt;del&gt;SERVER-53093&lt;/del&gt;&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;A &lt;tt&gt;StaleDbRoutingVersion&lt;/tt&gt; has a &lt;tt&gt;DatabaseVersion&lt;/tt&gt; and the &lt;tt&gt;DatabaseVersion&lt;/tt&gt; class was extended with a &lt;tt&gt;Timestamp&lt;/tt&gt; field in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52933&quot; title=&quot;Add timestamp to the DatabaseVersion IDL&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52933&quot;&gt;&lt;del&gt;SERVER-52933&lt;/del&gt;&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;We don&apos;t have to worry about potential issues parsing the versions of stale errors in old binaries. Let&apos;s assume that we have a sharded cluster with 5.0 binaries and 5.0 FCV. If we want to downgrade our sharded cluster to BIN 4.4 FCV 4.4 first we should execute a setFCV(4.4). Once this operation is completed, we can guarantee that all the metadata in the sharded cluster is in the old metadata format, so it is safe to start replacing the 5.0 binaries by the new ones. See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53104&quot; title=&quot;Ensure all shard-local cache collections of config.collections contain timestamps after upgrade&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53104&quot;&gt;&lt;del&gt;SERVER-53104&lt;/del&gt;&lt;/a&gt; for more details.&lt;/li&gt;
&lt;/ul&gt;
</comment>
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