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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-34424] a changeStream on a database will incorrectly notify that unsharded collections in the database have been dropped after movePrimary</title>
                <link>https://jira.mongodb.org/browse/SERVER-34424</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;One fix for this would be to mark &quot;dropCollections&quot; done on all the unsharded collections in the database at the end of movePrimary as &quot;fromMigrate&quot;, so that they are ignored by changeStreams.&lt;/p&gt;

&lt;p&gt;Also, this problem would go away if unsharded collections were treated as sharded collections with one chunk.&lt;/p&gt;</description>
                <environment></environment>
        <key id="525571">SERVER-34424</key>
            <summary>a changeStream on a database will incorrectly notify that unsharded collections in the database have been dropped after movePrimary</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                            <label>movePrimary</label>
                            <label>sharding-common-backlog</label>
                    </labels>
                <created>Wed, 11 Apr 2018 21:24:01 +0000</created>
                <updated>Mon, 31 Jul 2023 07:11:54 +0000</updated>
                                            <version>3.7.3</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2307337" author="esha.maharishi@10gen.com" created="Mon, 1 Jul 2019 18:24:14 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=andre.spiegel&quot; class=&quot;user-hover&quot; rel=&quot;andre.spiegel&quot;&gt;andre.spiegel&lt;/a&gt;, just curious, are they trying to movePrimary because they are removing a shard?&lt;/p&gt;</comment>
                            <comment id="1870051" author="schwerin" created="Fri, 20 Apr 2018 14:48:11 +0000"  >&lt;p&gt;Moving to sharding team Needs Triage.  Either of the two solutions in the description make sense, and are projects in the sharding catalog. This is not urgent, given the infrequency of movePrimary.&lt;/p&gt;</comment>
                            <comment id="1863740" author="schwerin" created="Fri, 13 Apr 2018 15:56:34 +0000"  >&lt;p&gt;This is probably yacceptable until we implement changes to allow whole-database changestreams to survive individual collection drops.&lt;/p&gt;</comment>
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