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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-42152] Delete existing chunks on new epoch in persisted routing table cache</title>
                <link>https://jira.mongodb.org/browse/SERVER-42152</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently the shard server catalog cache loader will not clear existing chunks after detecting a new epoch if the new version of the collection has a different shard key, relying on an earlier refresh discovering the collection was dropped and dropping the cached chunks collection then. Refining a collection&apos;s shard key will change its epoch without dropping it first, so the class should be modified to delete all existing chunks in a collection&apos;s cache after detecting a new epoch and it should be verified that the new shard key is correctly propagated through to the in-memory routing table&apos;s refresh.&lt;/p&gt;</description>
                <environment></environment>
        <key id="852566">SERVER-42152</key>
            <summary>Delete existing chunks on new epoch in persisted routing table cache</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="jamie.heppenstall@mongodb.com">James Heppenstall</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Wed, 10 Jul 2019 22:02:36 +0000</created>
                <updated>Sun, 29 Oct 2023 22:19:11 +0000</updated>
                            <resolved>Thu, 1 Aug 2019 15:18:50 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2354349" author="xgen-internal-githook" created="Thu, 1 Aug 2019 15:14:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jamie Heppenstall&apos;, &apos;username&apos;: &apos;JamesHeppenstall&apos;, &apos;email&apos;: &apos;jamie.heppenstall@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42152&quot; title=&quot;Delete existing chunks on new epoch in persisted routing table cache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42152&quot;&gt;&lt;del&gt;SERVER-42152&lt;/del&gt;&lt;/a&gt; Delete existing chunks on new epoch in persisted routing table cache&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5cbe01663884b321c45145c29bb9d9668125392e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5cbe01663884b321c45145c29bb9d9668125392e&lt;/a&gt;&lt;/p&gt;</comment>
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