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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-71120] Collection creation within aggregations do not serialize with critical section</title>
                <link>https://jira.mongodb.org/browse/SERVER-71120</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67633&quot; title=&quot;Serialise explicit/implicit createCollection requests with sharded operations holding a RecoverableCriticalSection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67633&quot;&gt;&lt;del&gt;SERVER-67633&lt;/del&gt;&lt;/a&gt; we made that create collection operations serialize with the collection critical section if present. In particular in order to achieve so we made that the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/aedd944d84ce32e8a02441ad32f1fdd5c82dde32/src/mongo/s/commands/cluster_create_cmd.cpp#L144&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongos always add shard version UNSHARDED&lt;/a&gt; to the create collection request that is being forwarded to the shard.&lt;br/&gt;
The problem is that we forget about collection creation path that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/aedd944d84ce32e8a02441ad32f1fdd5c82dde32/src/mongo/db/pipeline/process_interface/shardsvr_process_interface.cpp#L293&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;can happen during aggregation execution&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;This means that collection creation that happens as part of aggregation execution will ignore the critical section&lt;/p&gt;

&lt;p&gt;The goal of this ticket is to:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Fix the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/aedd944d84ce32e8a02441ad32f1fdd5c82dde32/src/mongo/db/pipeline/process_interface/shardsvr_process_interface.cpp#L293&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;executeCommandOnDatabasePrimary&lt;/a&gt;. The &lt;tt&gt;cmdObjWithShardVersion&lt;/tt&gt; variable is never used.&lt;/li&gt;
	&lt;li&gt;Ensure all creation path use the &lt;tt&gt;executeCommandOnDatabasePrimary&lt;/tt&gt; wrapper and properly attach the shard version UNSHARDED.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2176318">SERVER-71120</key>
            <summary>Collection creation within aggregations do not serialize with critical section</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="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="tommaso.tocci@mongodb.com">Tommaso Tocci</reporter>
                        <labels>
                            <label>shardingemea-qw</label>
                    </labels>
                <created>Mon, 7 Nov 2022 13:49:54 +0000</created>
                <updated>Sun, 29 Oct 2023 21:30:59 +0000</updated>
                            <resolved>Tue, 20 Dec 2022 21:20:06 +0000</resolved>
                                    <version>6.1.0-rc0</version>
                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5068629" author="xgen-internal-githook" created="Tue, 20 Dec 2022 21:01:35 +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-71120&quot; title=&quot;Collection creation within aggregations do not serialize with critical section&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71120&quot;&gt;&lt;del&gt;SERVER-71120&lt;/del&gt;&lt;/a&gt; Fix serialisation of collection created within aggregations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bd7dac53bbae3910b31ef7fb02dbcb75f70abcb0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bd7dac53bbae3910b31ef7fb02dbcb75f70abcb0&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2079317">SERVER-67633</issuekey>
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