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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-33781] Upgrade/downgrade the chunks history on FCV change</title>
                <link>https://jira.mongodb.org/browse/SERVER-33781</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This ticket covers the upgrade/downgrade work in the &lt;a href=&quot;https://docs.google.com/document/d/1aVs4fdp4OZqoAsjbzDOVm06TdDUikfXgFU0hgNc0Vws/edit#heading=h.t0gmc8qcc78u&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;design spec&lt;/a&gt;. It should include writing the history on upgrade and deleting it on downgrade, plus synchronizing the FCV change with any concurrently running move/split/merge operations. It is acceptable to block these operations while the upgrade/downgrade is running, but ideally that blocking should be limited on a per-collection basis and not globally.&lt;/p&gt;

&lt;p&gt;As part of this ticket we should also make the shards and config server reject &lt;tt&gt;atClusterTime&lt;/tt&gt; requests under FCV 3.6 and also that the ChunkManager::getCollectionRoutingInfoAt call will fail if it contains no history.&lt;/p&gt;</description>
                <environment></environment>
        <key id="508770">SERVER-33781</key>
            <summary>Upgrade/downgrade the chunks history on FCV change</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="martin.neupauer@mongodb.com">Martin Neupauer</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Fri, 9 Mar 2018 17:17:56 +0000</created>
                <updated>Sun, 29 Oct 2023 22:33:56 +0000</updated>
                            <resolved>Fri, 13 Apr 2018 17:00:25 +0000</resolved>
                                                    <fixVersion>3.7.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1863816" author="xgen-internal-githook" created="Fri, 13 Apr 2018 16:54:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;martin.neupauer@mongodb.com&apos;, &apos;name&apos;: &apos;Martin Neupauer&apos;, &apos;username&apos;: &apos;MartinNeupauer&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33781&quot; title=&quot;Upgrade/downgrade the chunks history on FCV change&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33781&quot;&gt;&lt;del&gt;SERVER-33781&lt;/del&gt;&lt;/a&gt; upgrade/downgrade config.chunks metadata with a new history field.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fde45e48ef4a86fb19604843fdee272a22fcd475&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fde45e48ef4a86fb19604843fdee272a22fcd475&lt;/a&gt;&lt;/p&gt;</comment>
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