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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-56696] Move cluster topology change notifications out of the change stream pipeline</title>
                <link>https://jira.mongodb.org/browse/SERVER-56696</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, when a collection migrates to a new shard, an event is generated that passes through the pipeline to the &lt;tt&gt;mongoS&lt;/tt&gt;, where it is consumed by the &lt;tt&gt;DocumentSourceUpdateOnAddShard&lt;/tt&gt; stage. But when we start pushing down user-defined &lt;tt&gt;$match&lt;/tt&gt; filters to the shard, we can no longer guarantee that the event will make it as far as DSUOAS, and migration events may therefore be missed.&lt;/p&gt;

&lt;p&gt;We should move our handling of the &lt;tt&gt;kNewShardDetected&lt;/tt&gt; event out of the change stream pipeline.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1704678">SERVER-56696</key>
            <summary>Move cluster topology change notifications out of the change stream pipeline</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="rishab.joshi@mongodb.com">Rishab Joshi</assignee>
                                    <reporter username="bernard.gorman@mongodb.com">Bernard Gorman</reporter>
                        <labels>
                    </labels>
                <created>Thu, 6 May 2021 09:46:11 +0000</created>
                <updated>Sun, 29 Oct 2023 21:53:58 +0000</updated>
                            <resolved>Thu, 20 May 2021 01:01:44 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="4108306" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 19:03:18 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3793455" author="xgen-internal-githook" created="Thu, 20 May 2021 00:55:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Rishab Joshi&apos;, &apos;email&apos;: &apos;rishab.joshi@mongodb.com&apos;, &apos;username&apos;: &apos;rishvin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56696&quot; title=&quot;Move cluster topology change notifications out of the change stream pipeline&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56696&quot;&gt;&lt;del&gt;SERVER-56696&lt;/del&gt;&lt;/a&gt;: Introduce a new change stream stage to handle the topology&lt;br/&gt;
change event.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e53e42046e8e25f4cf9b6ffa68c71c2add8ae793&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e53e42046e8e25f4cf9b6ffa68c71c2add8ae793&lt;/a&gt;&lt;/p&gt;</comment>
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