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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-43241] Fix Executor failures in ARS dtor during shutdown</title>
                <link>https://jira.mongodb.org/browse/SERVER-43241</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are a variety of bad races in global shutdown present in pre-4.2 versions of mongod and mongos.  The principal problem is that we have a variety of background executors which are used for networking which are held on user threads by bare pointer.  During global shutdown, we kill all user operations (which begins unwinding user stacks), while also shutting down and destroying those global objects.  This can lead to use after frees, as well as scheduling errors, if those user threads unwind after global executor destruction.&lt;/p&gt;

&lt;p&gt;These problems tend to be rare because we do process termination via _Exit, which doesn&apos;t usually join user threads, meaning we tend only to see these problems in the presence of many user threads, where the shutdown thread get&apos;s descheduled at particular points in execution.&lt;/p&gt;

&lt;p&gt;Note that this problem also isn&apos;t present in 4.2 and later, as we&apos;ve replaced the executor machinery so that executors are held by shared_ptr, and callbacks can see if they&apos;re being run on shutdown executors.&lt;/p&gt;</description>
                <environment></environment>
        <key id="920934">SERVER-43241</key>
            <summary>Fix Executor failures in ARS dtor during shutdown</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="ben.caimano@mongodb.com">Benjamin Caimano</assignee>
                                    <reporter username="mira.carey@mongodb.com">Mira Carey</reporter>
                        <labels>
                    </labels>
                <created>Mon, 9 Sep 2019 21:50:41 +0000</created>
                <updated>Sun, 29 Oct 2023 22:17:21 +0000</updated>
                            <resolved>Wed, 30 Oct 2019 17:44:06 +0000</resolved>
                                    <version>4.0.12</version>
                                    <fixVersion>4.0.14</fixVersion>
                                    <component>Networking</component>
                                        <votes>1</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2508802" author="xgen-internal-githook" created="Wed, 30 Oct 2019 17:40:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;bcaimano&apos;, &apos;email&apos;: &apos;ben.caimano@mongodb.com&apos;, &apos;name&apos;: &apos;Ben Caimano&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43241&quot; title=&quot;Fix Executor failures in ARS dtor during shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43241&quot;&gt;&lt;del&gt;SERVER-43241&lt;/del&gt;&lt;/a&gt; Never shutdown grid executors&lt;/p&gt;

&lt;p&gt;This commit is applied only to v4.0.&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2fde5d70e4b45caf243019afe2d27d4a77f07194&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2fde5d70e4b45caf243019afe2d27d4a77f07194&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="933100">SERVER-43379</issuekey>
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