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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-47166] Self-deadlock when cancelling networking sessions</title>
                <link>https://jira.mongodb.org/browse/SERVER-47166</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;#L188]&quot; target=&quot;_blank&quot; rel=&quot;noopener&quot;&gt;cancelSession&lt;/a&gt; erases the TransportSession under the Baton&apos;s mutex.&#160; If that session has an outstanding Promise, however, it will try to break that promise, which in turn schedules the corresponding Future to run (and resolve with a BrokenPromise error).&#160; But scheduling the Future to run requires locking the Baton&apos;s mutex.&#160; This results in deadlock.&lt;/p&gt;

&lt;p&gt;Instead of destroying the TransportSession under the Baton&apos;s mutex, we should move the TransportSession out of the Baton&apos;s _sessions map under the mutex, the release the mutex before actually destroying the TransportSession.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1294535">SERVER-47166</key>
            <summary>Self-deadlock when cancelling networking sessions</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="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Fri, 27 Mar 2020 21:06:21 +0000</created>
                <updated>Sun, 29 Oct 2023 22:10:13 +0000</updated>
                            <resolved>Thu, 16 Apr 2020 16:28:54 +0000</resolved>
                                                    <fixVersion>4.4.0</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Concurrency</component>
                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3052965" author="xgen-internal-githook" created="Thu, 23 Apr 2020 16:48:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ben Caimano&apos;, &apos;email&apos;: &apos;ben.caimano@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47166&quot; title=&quot;Self-deadlock when cancelling networking sessions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47166&quot;&gt;&lt;del&gt;SERVER-47166&lt;/del&gt;&lt;/a&gt; Explicitly break Baton Promises outside of locks&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/36c9eb3937d083812788f6c1b522d92d6dfe9af9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/36c9eb3937d083812788f6c1b522d92d6dfe9af9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3042863" author="xgen-internal-githook" created="Thu, 16 Apr 2020 16:26:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ben Caimano&apos;, &apos;email&apos;: &apos;ben.caimano@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47166&quot; title=&quot;Self-deadlock when cancelling networking sessions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47166&quot;&gt;&lt;del&gt;SERVER-47166&lt;/del&gt;&lt;/a&gt; Explicitly break Baton Promises outside of locks&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5a3b48b31445888d06b593055ffcd13fa0d701b4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5a3b48b31445888d06b593055ffcd13fa0d701b4&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1300494">SERVER-47229</issuekey>
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