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    <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-66825] Deadlock on migration recipient stepdown</title>
                <link>https://jira.mongodb.org/browse/SERVER-66825</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On stepdown, while the replication coordinator is holding the RSTL lock in exclusive mode, MigrationDestinationManager::onStepDown() is called. This method takes the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a5dd1d90a957e17f954b2df97d3da4a3644e166f/src/mongo/db/s/migration_destination_manager.cpp#L1950&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MigrationDestinationManager::_mutex&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;On the other side, MigrationDestinationManager::exitCriticalSection() first takes the same mutex, and later takes the lock hierarchy (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/a5dd1d90a957e17f954b2df97d3da4a3644e166f/src/mongo/db/s/migration_destination_manager.cpp#L737&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; or &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a5dd1d90a957e17f954b2df97d3da4a3644e166f/src/mongo/db/s/migration_destination_manager.cpp#L747&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) which includes the RSTL lock.&lt;/p&gt;

&lt;p&gt;This inverted lock acquisition order can cause a deadlock on stepdown when a migration is interrupted if a particular interleaving occurs.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2056598">SERVER-66825</key>
            <summary>Deadlock on migration recipient stepdown</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="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</assignee>
                                    <reporter username="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</reporter>
                        <labels>
                    </labels>
                <created>Fri, 27 May 2022 10:03:33 +0000</created>
                <updated>Sun, 29 Oct 2023 21:37:39 +0000</updated>
                            <resolved>Wed, 1 Jun 2022 08:10:03 +0000</resolved>
                                    <version>6.0.0-rc6</version>
                                    <fixVersion>6.0.0-rc9</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4589321" author="xgen-internal-githook" created="Thu, 2 Jun 2022 10:38:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66825&quot; title=&quot;Deadlock on migration recipient stepdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66825&quot;&gt;&lt;del&gt;SERVER-66825&lt;/del&gt;&lt;/a&gt; Fix deadlock on MigrationDestinationManager::onStepDown&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 589d65d55b880aa28803e4b4b9f109dd9e5b60bc)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/60f659abea5b129f538106b1fe3f6dfc8b621ffa&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/60f659abea5b129f538106b1fe3f6dfc8b621ffa&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4585793" author="xgen-internal-githook" created="Wed, 1 Jun 2022 08:08:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66825&quot; title=&quot;Deadlock on migration recipient stepdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66825&quot;&gt;&lt;del&gt;SERVER-66825&lt;/del&gt;&lt;/a&gt; Fix deadlock on MigrationDestinationManager::onStepDown&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/589d65d55b880aa28803e4b4b9f109dd9e5b60bc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/589d65d55b880aa28803e4b4b9f109dd9e5b60bc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4577857" author="suganthi.mani" created="Fri, 27 May 2022 14:12:23 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jordi.serra-torrens%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;jordi.serra-torrens@mongodb.com&quot;&gt;jordi.serra-torrens@mongodb.com&lt;/a&gt;&#160; Just an FYI,&#160; we had a similar deadlock issues in tenant migration code due to the lock order violation between RSTL and instance mutex lock. We are planning to address that as part of PM-2660 (Primary Only Service Improvements). Currently Service arch team is collecting the &lt;a href=&quot;https://docs.google.com/document/d/1S6tOxN8WqGxROfKfsNPa5359SphI23cf5z-pNhgb6-E/edit#&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;POS pain-points&lt;/a&gt;. I have already added interruption logic pain point leading to deadlocks &lt;a href=&quot;https://docs.google.com/document/d/1S6tOxN8WqGxROfKfsNPa5359SphI23cf5z-pNhgb6-E/edit#bookmark=id.3sirarc0nsk1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. I am going to link this ticket as well in the doc to prioritize the interruption pain-point.&lt;/p&gt;</comment>
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