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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-61026] Invert order of shards receiving drop collection participant command</title>
                <link>https://jira.mongodb.org/browse/SERVER-61026</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Both &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2a0cafd88c343e3df4c20f8d94c5a12fb21bd9c1/src/mongo/db/s/drop_database_coordinator.cpp#L141-L153&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;drop database&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2a0cafd88c343e3df4c20f8d94c5a12fb21bd9c1/src/mongo/db/s/drop_collection_coordinator.cpp#L201-L213&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;drop collection&lt;/a&gt; coordinators are sending the drop participant command first to the primary shard and then to the others.&lt;/p&gt;

&lt;p&gt;As a result, the current behavior permits to see the following change stream events (thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn&quot;&gt;max.hirschhorn&lt;/a&gt; for pointing that out):&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;drop change event from primary shard&lt;/li&gt;
	&lt;li&gt;insert change event from primary shard (unsharded collection implicitly recreated)&lt;/li&gt;
	&lt;li&gt;drop change event from other shard&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;It would be difficult for a client to know whether the insert (2) happened during or after the drop. Inverting the order would prevent such interleaving of events.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1910710">SERVER-61026</key>
            <summary>Invert order of shards receiving drop collection participant command</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="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 Oct 2021 07:52:10 +0000</created>
                <updated>Sun, 29 Oct 2023 21:46:52 +0000</updated>
                            <resolved>Wed, 27 Oct 2021 17:54:17 +0000</resolved>
                                    <version>5.0.3</version>
                    <version>5.1.0-rc2</version>
                                    <fixVersion>5.2.0</fixVersion>
                    <fixVersion>5.0.4</fixVersion>
                    <fixVersion>5.1.0-rc3</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4153932" author="xgen-internal-githook" created="Thu, 28 Oct 2021 10:27:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61026&quot; title=&quot;Invert order of shards receiving drop collection participant command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61026&quot;&gt;&lt;del&gt;SERVER-61026&lt;/del&gt;&lt;/a&gt; Invert order of shards receiving drop collection participant command&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/92cd5d41f66a87f8bc1dca77613f98103d2419a0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/92cd5d41f66a87f8bc1dca77613f98103d2419a0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4153863" author="xgen-internal-githook" created="Thu, 28 Oct 2021 09:47:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61026&quot; title=&quot;Invert order of shards receiving drop collection participant command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61026&quot;&gt;&lt;del&gt;SERVER-61026&lt;/del&gt;&lt;/a&gt; Invert order of shards receiving drop collection participant command&lt;br/&gt;
Branch: v5.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1a192eb1ed4dc0f3c2be3afb2cc79e50eae81ebc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1a192eb1ed4dc0f3c2be3afb2cc79e50eae81ebc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4152289" author="xgen-internal-githook" created="Wed, 27 Oct 2021 17:31:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61026&quot; title=&quot;Invert order of shards receiving drop collection participant command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61026&quot;&gt;&lt;del&gt;SERVER-61026&lt;/del&gt;&lt;/a&gt; Invert order of shards receiving drop collection participant command&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f977f696a5179cbf36d49e55dcbd0bd6a8d7b975&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f977f696a5179cbf36d49e55dcbd0bd6a8d7b975&lt;/a&gt;&lt;/p&gt;</comment>
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