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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-32145] Avoid dropping lock before cleaning up DocumentSourceCursor&apos;s PlanExecutor</title>
                <link>https://jira.mongodb.org/browse/SERVER-32145</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In order to dispose of a PlanExecutor, we need to acquire the collection lock to avoid races upon deregistering the PlanExecutor from the CursorManager. However, in the case where the PlanExecutor has been exhausted or the limit has been reached (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/1af849f14e084b087e41147f31d5775299763f6b/src/mongo/db/pipeline/document_source_cursor.cpp#L127&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this case&lt;/a&gt;) we end up releasing the lock directly before re-acquiring it to dispose of the PlanExecutor. We should simply dispose of the PlanExecutor while we still hold the lock.&lt;/p&gt;</description>
                <environment></environment>
        <key id="467098">SERVER-32145</key>
            <summary>Avoid dropping lock before cleaning up DocumentSourceCursor&apos;s PlanExecutor</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="charlie.swanson@mongodb.com">Charlie Swanson</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                    </labels>
                <created>Fri, 1 Dec 2017 21:09:42 +0000</created>
                <updated>Mon, 30 Oct 2023 23:10:13 +0000</updated>
                            <resolved>Thu, 7 Dec 2017 16:24:38 +0000</resolved>
                                                    <fixVersion>3.6.2</fixVersion>
                    <fixVersion>3.7.1</fixVersion>
                                    <component>Aggregation Framework</component>
                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1763445" author="xgen-internal-githook" created="Tue, 2 Jan 2018 22:23:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Charlie Swanson&apos;, &apos;username&apos;: &apos;cswanson310&apos;, &apos;email&apos;: &apos;charlie.swanson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32145&quot; title=&quot;Avoid dropping lock before cleaning up DocumentSourceCursor&amp;#39;s PlanExecutor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32145&quot;&gt;&lt;del&gt;SERVER-32145&lt;/del&gt;&lt;/a&gt; Avoid dropping lock before disposing of PlanExecutor&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/81706786679050a62704bd4480642b3d1bb46ee9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/81706786679050a62704bd4480642b3d1bb46ee9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1745492" author="xgen-internal-githook" created="Thu, 7 Dec 2017 16:24:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Charlie Swanson&apos;, &apos;username&apos;: &apos;cswanson310&apos;, &apos;email&apos;: &apos;charlie.swanson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32145&quot; title=&quot;Avoid dropping lock before cleaning up DocumentSourceCursor&amp;#39;s PlanExecutor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32145&quot;&gt;&lt;del&gt;SERVER-32145&lt;/del&gt;&lt;/a&gt; Avoid dropping lock before disposing of PlanExecutor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8d2a7030e31ef857889d22f7246b77f7f13194cd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8d2a7030e31ef857889d22f7246b77f7f13194cd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1740545" author="charlie.swanson" created="Fri, 1 Dec 2017 21:38:49 +0000"  >&lt;p&gt;Yep! summarized/linked in the code review.&lt;/p&gt;</comment>
                            <comment id="1740517" author="david.storch" created="Fri, 1 Dec 2017 21:17:47 +0000"  >&lt;p&gt;Agree, as long as experiments show that there is a real performance benefit associated with this change. Do you have any numbers yet?&lt;/p&gt;</comment>
                            <comment id="1740510" author="charlie.swanson" created="Fri, 1 Dec 2017 21:10:19 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=david.storch&quot; class=&quot;user-hover&quot; rel=&quot;david.storch&quot;&gt;david.storch&lt;/a&gt; I dropped this into the current sprint, let me know if you disagree. &lt;/p&gt;</comment>
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