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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-71085] DropCollectionCoordinator should only report a single drop event through the Primary Shard oplog</title>
                <link>https://jira.mongodb.org/browse/SERVER-71085</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a &lt;tt&gt;nss.drop()&lt;/tt&gt; command gets executed on a sharded collection, every shard participating in the DDL is currently adding an internal {&lt;tt&gt;op: drop&lt;/tt&gt;} &#160;event to its oplog when the collection gets locally dropped.&lt;/p&gt;

&lt;p&gt;This may generate some ambiguity from the perspective of a mongos serving a &lt;tt&gt;nss.watch()&lt;/tt&gt; request (which is collecting oplog events from multiple shards) to establish the exact point in time at which the change stream may be considered as invalidated.&lt;/p&gt;

&lt;p&gt;To solve this,&#160;&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;The &lt;tt&gt;DropCollectionParticipant&lt;/tt&gt; should hide the &quot;local drop&quot; event by marking the related oplog entry with the &lt;tt&gt;fromMigrate&lt;/tt&gt; option.&lt;/li&gt;
	&lt;li&gt;The &lt;tt&gt;DropCollectionCoordinator&lt;/tt&gt; should issue a single regular drop event once the commit phase of the DDL is completed.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2175159">SERVER-71085</key>
            <summary>DropCollectionCoordinator should only report a single drop event through the Primary Shard oplog</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="paolo.polato@mongodb.com">Paolo Polato</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                    </labels>
                <created>Fri, 4 Nov 2022 14:10:58 +0000</created>
                <updated>Sun, 29 Oct 2023 21:31:03 +0000</updated>
                            <resolved>Fri, 25 Nov 2022 15:37:28 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5007994" author="xgen-internal-githook" created="Fri, 25 Nov 2022 15:11:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Paolo Polato&apos;, &apos;email&apos;: &apos;paolo.polato@mongodb.com&apos;, &apos;username&apos;: &apos;ppolato&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71085&quot; title=&quot;DropCollectionCoordinator should only report a single drop event through the Primary Shard oplog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71085&quot;&gt;&lt;del&gt;SERVER-71085&lt;/del&gt;&lt;/a&gt; Generate a single oplog entry from the primary shard when _shardsvrCreateCollection() is invoked&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8a01d8d90871e627134a553611d3f6b2caacf9c4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8a01d8d90871e627134a553611d3f6b2caacf9c4&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2203521">SERVER-71880</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2197128">SERVER-71667</issuekey>
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