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    <title>MongoDB Jira</title>
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    <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-77313] Add new lock types RESOURCE_DDL_DATABASE and RESOURCE_DDL_COLLECTION</title>
                <link>https://jira.mongodb.org/browse/SERVER-77313</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add new LockManager lock types RESOURCE_DDL_DATABASE and RESOURCE_DDL_COLLECTION to be used for the new DDLLockManager.&lt;/p&gt;

&lt;p&gt;Neither of them will be related to the engine lock hierarchy (Global &amp;gt; Database &amp;gt; Collection). However, to avoid deadlocks, none of the engine hierarchy locks has to be held when a RESOURCE_DDL_* lock is being acquired.&lt;/p&gt;

&lt;p&gt;The advantages of having the DDL locks managed by the LockManager are:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Enables a multi-granularity lock acquisition. This means that DDL locks could be taken in different modes: S, IS, X or IX.&lt;/li&gt;
	&lt;li&gt;Improves the DDL locking debuggability. The DDL locks will be integrated with the already existing LockManager debug utilities.&lt;/li&gt;
	&lt;li&gt;Code robustness. The &lt;em&gt;LockManager&lt;/em&gt; is a relatively old and widely used service with up-and-going maintenance.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2345653">SERVER-77313</key>
            <summary>Add new lock types RESOURCE_DDL_DATABASE and RESOURCE_DDL_COLLECTION</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="silvia.surroca@mongodb.com">Silvia Surroca</assignee>
                                    <reporter username="silvia.surroca@mongodb.com">Silvia Surroca</reporter>
                        <labels>
                    </labels>
                <created>Fri, 19 May 2023 13:38:25 +0000</created>
                <updated>Sun, 29 Oct 2023 21:21:11 +0000</updated>
                            <resolved>Mon, 29 May 2023 14:04:31 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5458632" author="xgen-internal-githook" created="Mon, 29 May 2023 14:26:00 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Silvia Surroca&apos;, &apos;email&apos;: &apos;silvia.surroca@mongodb.com&apos;, &apos;username&apos;: &apos;silviasuhu&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77313&quot; title=&quot;Add new lock types RESOURCE_DDL_DATABASE and RESOURCE_DDL_COLLECTION&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77313&quot;&gt;&lt;del&gt;SERVER-77313&lt;/del&gt;&lt;/a&gt; Add new lock types RESOURCE_DDL_DATABASE and RESOURCE_DDL_COLLECTION&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0e6a660c41d4a07228837835f572daedd3683fc0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0e6a660c41d4a07228837835f572daedd3683fc0&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2349233">SERVER-77421</issuekey>
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