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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-53661] SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex</title>
                <link>https://jira.mongodb.org/browse/SERVER-53661</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/503c08c5cf2a68b56b46b2a5c52126fa65848c44/src/mongo/util/future_impl.h#L501&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;FutureResolution mutex is marked level 0&lt;/a&gt;. So is the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/503c08c5cf2a68b56b46b2a5c52126fa65848c44/src/mongo/db/session_catalog.h#L156-L158&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;SessionCatalog mutex&lt;/a&gt;. This is a problem because while the SessionCatalog mutex is held, we call OperationContext::markKilled, which then resolves a future which requires acquiring the FutureResolution mutex. This is only a problem in tests since there&apos;s no actual risk for deadlock - it&apos;s just reported as a level violation by the latch analyzer.&lt;/p&gt;

&lt;p&gt;To fix it we need to either make the SessionCatalog mutex level 1, or make the FutureResolution into a std::mutex with no leveling since it&apos;s such a low level component.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Acceptance criteria:&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;Remove the hierarchy number from the FutureResolution mutex&lt;/p&gt;</description>
                <environment></environment>
        <key id="1584464">SERVER-53661</key>
            <summary>SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex</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="luis.osta@mongodb.com">Luis Osta</assignee>
                                    <reporter username="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                            <label>servicearch-wfbf-day</label>
                            <label>sharding-csrs-stepdown-also</label>
                    </labels>
                <created>Fri, 8 Jan 2021 17:12:44 +0000</created>
                <updated>Sun, 29 Oct 2023 21:59:01 +0000</updated>
                            <resolved>Thu, 20 May 2021 13:03:09 +0000</resolved>
                                                    <fixVersion>5.0.0-rc0</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3775589" author="xgen-internal-githook" created="Sun, 16 May 2021 15:30:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53661&quot; title=&quot;SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53661&quot;&gt;&lt;del&gt;SERVER-53661&lt;/del&gt;&lt;/a&gt; re-enable disable index_commit_currentop_slow.js&lt;/p&gt;

&lt;p&gt;This reverts commit beb176da79f83da393da9416b3552d00f4ff50c9.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f856bd9d8ea972ffa55e4762b8164fa2145e8bdb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f856bd9d8ea972ffa55e4762b8164fa2145e8bdb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3775485" author="xgen-internal-githook" created="Sun, 16 May 2021 10:23:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53661&quot; title=&quot;SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53661&quot;&gt;&lt;del&gt;SERVER-53661&lt;/del&gt;&lt;/a&gt; fix latch name in index_commit_currentop_slow.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ca69b62fe50e03922c96a75de509f3ad33fb4363&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ca69b62fe50e03922c96a75de509f3ad33fb4363&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3775191" author="xgen-internal-githook" created="Sat, 15 May 2021 14:06:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53661&quot; title=&quot;SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53661&quot;&gt;&lt;del&gt;SERVER-53661&lt;/del&gt;&lt;/a&gt; temporarily disable index_commit_currentop_slow.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/beb176da79f83da393da9416b3552d00f4ff50c9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/beb176da79f83da393da9416b3552d00f4ff50c9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3774705" author="xgen-internal-githook" created="Fri, 14 May 2021 19:50:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Luis Osta&apos;, &apos;email&apos;: &apos;luis.osta@mongodb.com&apos;, &apos;username&apos;: &apos;LuisOsta&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53661&quot; title=&quot;SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53661&quot;&gt;&lt;del&gt;SERVER-53661&lt;/del&gt;&lt;/a&gt; SessionCatalog mutex is level 0 and is held while acquiring the FutureResolution mutex&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4099baf59544e56922641fe10b5cc07d5a99e591&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4099baf59544e56922641fe10b5cc07d5a99e591&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2332290">SERVER-76851</issuekey>
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