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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-48689] MigrationDestinationManager waits for thread to join with session checked out</title>
                <link>https://jira.mongodb.org/browse/SERVER-48689</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;MigrationDestinationManager&lt;/tt&gt; waits for a thread to join &lt;a href=&quot;https://github.com/mongodb/mongo/blob/87de9a0cb1e898d7b49c04558e60c40103ee1d8f/src/mongo/db/s/session_catalog_migration_destination.cpp#L351&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; while holding a session checked out. This thread can do blocking work, such as &lt;a href=&quot;https://github.com/mongodb/mongo/blob/87de9a0cb1e898d7b49c04558e60c40103ee1d8f/src/mongo/db/s/session_catalog_migration_destination.cpp#L226&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;checking out a different session&lt;/a&gt;. This can lead to a deadlock with a thread that is checking out all of the sessions for kill:&lt;/p&gt;

&lt;p&gt;(1) &lt;tt&gt;MigrationDestinationManager&lt;/tt&gt; checks out session A.&lt;br/&gt;
 (2)&#160;Killing thread marks all sessions as killed.&lt;br/&gt;
 (3) Killing thread waits to check out session A for kill.&lt;br/&gt;
 (4) &lt;tt&gt;_thread&lt;/tt&gt; waits to check out session B, but is blocked because session B is marked as killed.&lt;br/&gt;
 (5) &lt;tt&gt;MigrationDestinationManager&lt;/tt&gt; waits for &lt;tt&gt;_thread&lt;/tt&gt; to join.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1377106">SERVER-48689</key>
            <summary>MigrationDestinationManager waits for thread to join with session checked out</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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="tess.avitabile@mongodb.com">Tess Avitabile</reporter>
                        <labels>
                            <label>KP44</label>
                    </labels>
                <created>Wed, 10 Jun 2020 14:41:38 +0000</created>
                <updated>Sun, 29 Oct 2023 22:07:14 +0000</updated>
                            <resolved>Thu, 16 Jul 2020 14:29:29 +0000</resolved>
                                                    <fixVersion>4.4.1</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3335424" author="xgen-internal-githook" created="Wed, 12 Aug 2020 20:59:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48641&quot; title=&quot;Deadlock due to the MigrationDestinationManager waiting for write concern with the session checked-out&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48641&quot;&gt;&lt;del&gt;SERVER-48641&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48689&quot; title=&quot;MigrationDestinationManager waits for thread to join with session checked out&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48689&quot;&gt;&lt;del&gt;SERVER-48689&lt;/del&gt;&lt;/a&gt; Yield session in migration destination driver when waiting on replication and session migration&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 21b083c7352704fc8c3d8a4f33c54040259ff766)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/91f3ad01c5fe5599d9ba679a659745fa3b7eb00b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/91f3ad01c5fe5599d9ba679a659745fa3b7eb00b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3307128" author="tess.avitabile" created="Mon, 27 Jul 2020 13:30:08 +0000"  >&lt;p&gt;Does this affect 4.2? We need to backport&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47645&quot; title=&quot;Must invalidate all sessions on step down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47645&quot;&gt;&lt;del&gt;SERVER-47645&lt;/del&gt;&lt;/a&gt; to 4.2.&lt;/p&gt;</comment>
                            <comment id="3287908" author="xgen-internal-githook" created="Thu, 16 Jul 2020 14:07:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48641&quot; title=&quot;Deadlock due to the MigrationDestinationManager waiting for write concern with the session checked-out&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48641&quot;&gt;&lt;del&gt;SERVER-48641&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48689&quot; title=&quot;MigrationDestinationManager waits for thread to join with session checked out&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48689&quot;&gt;&lt;del&gt;SERVER-48689&lt;/del&gt;&lt;/a&gt; Yield session in migration destination driver when waiting on replication and session migration&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/21b083c7352704fc8c3d8a4f33c54040259ff766&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/21b083c7352704fc8c3d8a4f33c54040259ff766&lt;/a&gt;&lt;/p&gt;</comment>
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