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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>[DOCS-11642] Docs for SERVER-34243: listCollections should not require a MODE_S database lock</title>
                <link>https://jira.mongodb.org/browse/DOCS-11642</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description%3A&quot;&gt;&lt;/a&gt;Description: &lt;/h2&gt;

&lt;p&gt;listCollections only requires intent locks (MODE_IS).&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges%3A&quot;&gt;&lt;/a&gt;Scope of changes: &lt;/h2&gt;

&lt;ul&gt;
	&lt;li&gt;4.0.txt&lt;/li&gt;
	&lt;li&gt;db.CollectionInfos + db.collectionNames (double check how we phrase nameOnly &amp;#8211; IS lock)&lt;/li&gt;
	&lt;li&gt;command/listCollections.txt&lt;/li&gt;
&lt;/ul&gt;


&lt;h2&gt;&lt;a name=&quot;Impacttootherdocsoutsideofthisproduct%3A&quot;&gt;&lt;/a&gt;Impact to other docs outside of this product: &lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%3A&quot;&gt;&lt;/a&gt;MVP: &lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%3A&quot;&gt;&lt;/a&gt;Resources: &lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h2&gt;

&lt;p&gt;Currently the &lt;tt&gt;listCollections&lt;/tt&gt; command requires a &lt;tt&gt;MODE_S&lt;/tt&gt; lock on the database it&apos;s run on. When any transaction is active on that database, it will generally have a &lt;tt&gt;MODE_IX&lt;/tt&gt; lock on a collection. This will conflict with the &lt;tt&gt;MODE_S&lt;/tt&gt; lock on the database, causing &lt;tt&gt;listCollections&lt;/tt&gt; to block until the transaction is finished or aborted.&lt;/p&gt;

&lt;p&gt;It should be sufficient to have the &lt;tt&gt;MODE_IS&lt;/tt&gt; lock on the database, as long as each collection is locked as its details are gathered.&lt;/p&gt;</description>
                <environment></environment>
        <key id="532575">DOCS-11642</key>
            <summary>Docs for SERVER-34243: listCollections should not require a MODE_S database lock</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                    </labels>
                <created>Mon, 23 Apr 2018 15:31:51 +0000</created>
                <updated>Sun, 29 Oct 2023 13:57:56 +0000</updated>
                            <resolved>Mon, 11 Jun 2018 22:25:25 +0000</resolved>
                                                    <fixVersion>3.7.6</fixVersion>
                    <fixVersion>3.6.21</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1917744" author="xgen-internal-githook" created="Mon, 11 Jun 2018 22:22:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;kay-kim&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11642&quot; title=&quot;Docs for SERVER-34243: listCollections should not require a MODE_S database lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11642&quot;&gt;&lt;del&gt;DOCS-11642&lt;/del&gt;&lt;/a&gt;: listCollection and IS lock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/6639497f8cd7410ddf4626120e8d85ce8a358ce0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/6639497f8cd7410ddf4626120e8d85ce8a358ce0&lt;/a&gt;&lt;/p&gt;</comment>
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