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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-74248] Adapt the aggregation pipeline supporting nss.watch() to the op entry rules implemented by shardCollection</title>
                <link>https://jira.mongodb.org/browse/SERVER-74248</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74200&quot; title=&quot;Implement the 2-phase oplog notification in CreateCollectionCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74200&quot;&gt;&lt;del&gt;SERVER-74200&lt;/del&gt;&lt;/a&gt; is introducing a 2-phase notification protocol to describe the commit of a &lt;tt&gt;shardCollection&lt;/tt&gt; request.&lt;/p&gt;

&lt;p&gt;The protocol is planning  to expand the &lt;a href=&quot;https://github.com/10gen/mongo/blob/00a23774a12df9ffa09d2034d582b59cc6db7fff/src/mongo/db/repl/change_stream_oplog_notification.cpp#L60-L81&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;existing schema&lt;/a&gt; for the shardCollection op entry, which is a user-visible event.&lt;/p&gt;

&lt;p&gt;In order to maintain the existing contract between mongos and the clients of a &lt;tt&gt;nss/cluster.watch()&lt;/tt&gt; command, the pipeline that feeds change stream events should be modified so that:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;only shardCollection events with &lt;tt&gt;phase: &quot;commitSuccessful&quot; | MISSING&lt;/tt&gt; may reach the user&lt;/li&gt;
	&lt;li&gt;the original schema of the op entry is applied (that is, the fields introduced by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74200&quot; title=&quot;Implement the 2-phase oplog notification in CreateCollectionCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74200&quot;&gt;&lt;del&gt;SERVER-74200&lt;/del&gt;&lt;/a&gt; get removed).&lt;/li&gt;
&lt;/ul&gt;

</description>
                <environment></environment>
        <key id="2271750">SERVER-74248</key>
            <summary>Adapt the aggregation pipeline supporting nss.watch() to the op entry rules implemented by shardCollection</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="13203">Gone away</resolution>
                                        <assignee username="mindaugas.malinauskas@mongodb.com">Mindaugas Malinauskas</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                    </labels>
                <created>Wed, 22 Feb 2023 10:08:48 +0000</created>
                <updated>Fri, 27 Oct 2023 20:44:55 +0000</updated>
                            <resolved>Thu, 23 Mar 2023 10:34:07 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
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