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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-28348] Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes</title>
                <link>https://jira.mongodb.org/browse/SERVER-28348</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add logic to detect the deadlock from the digraph generated in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27874&quot; title=&quot;Display locks and generate digraph for threads using LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27874&quot;&gt;&lt;del&gt;SERVER-27874&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="365345">SERVER-28348</key>
            <summary>Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="9">Done</resolution>
                                        <assignee username="jonathan.abrahams">Jonathan Abrahams</assignee>
                                    <reporter username="jonathan.abrahams">Jonathan Abrahams</reporter>
                        <labels>
                            <label>bkp</label>
                    </labels>
                <created>Thu, 16 Mar 2017 15:32:28 +0000</created>
                <updated>Wed, 6 Dec 2017 21:11:29 +0000</updated>
                            <resolved>Fri, 21 Apr 2017 15:09:22 +0000</resolved>
                                                    <fixVersion>3.4.5</fixVersion>
                    <fixVersion>3.5.7</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1560660" author="xgen-internal-githook" created="Fri, 28 Apr 2017 20:53:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hptabster&apos;, u&apos;name&apos;: u&apos;Jonathan Abrahams&apos;, u&apos;email&apos;: u&apos;jonathan@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28348&quot; title=&quot;Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28348&quot;&gt;&lt;del&gt;SERVER-28348&lt;/del&gt;&lt;/a&gt; Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28348&quot; title=&quot;Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28348&quot;&gt;&lt;del&gt;SERVER-28348&lt;/del&gt;&lt;/a&gt; Add cycle detect message for detecting single-process deadlocks involving LockManager locks and/or pthread_mutexes&lt;/p&gt;

&lt;p&gt;(cherry picked from commit d4c16656d746c9e7a76579b593c41e48c915025d)&lt;br/&gt;
(cherry picked from commit c2cb98f46c70772d054ab0885720b666ae318cf0)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b389af851cb5b615e15210ab44b717936f43feb3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b389af851cb5b615e15210ab44b717936f43feb3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1560659" author="xgen-internal-githook" created="Fri, 28 Apr 2017 20:53:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hptabster&apos;, u&apos;name&apos;: u&apos;Jonathan Abrahams&apos;, u&apos;email&apos;: u&apos;jonathan@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28348&quot; title=&quot;Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28348&quot;&gt;&lt;del&gt;SERVER-28348&lt;/del&gt;&lt;/a&gt; Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28348&quot; title=&quot;Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28348&quot;&gt;&lt;del&gt;SERVER-28348&lt;/del&gt;&lt;/a&gt; Add cycle detect message for detecting single-process deadlocks involving LockManager locks and/or pthread_mutexes&lt;/p&gt;

&lt;p&gt;(cherry picked from commit d4c16656d746c9e7a76579b593c41e48c915025d)&lt;br/&gt;
(cherry picked from commit c2cb98f46c70772d054ab0885720b666ae318cf0)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b389af851cb5b615e15210ab44b717936f43feb3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b389af851cb5b615e15210ab44b717936f43feb3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1554716" author="xgen-internal-githook" created="Fri, 21 Apr 2017 15:09:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hptabster&apos;, u&apos;name&apos;: u&apos;Jonathan Abrahams&apos;, u&apos;email&apos;: u&apos;jonathan@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28348&quot; title=&quot;Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28348&quot;&gt;&lt;del&gt;SERVER-28348&lt;/del&gt;&lt;/a&gt; Add cycle detect message for detecting single-process deadlocks involving LockManager locks and/or pthread_mutexes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c2cb98f46c70772d054ab0885720b666ae318cf0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c2cb98f46c70772d054ab0885720b666ae318cf0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1554673" author="jonathan.abrahams" created="Fri, 21 Apr 2017 14:44:54 +0000"  >&lt;p&gt;We will add a message that the cycle has been detected, which can be costumed by the log extractor.&lt;/p&gt;</comment>
                            <comment id="1553968" author="xgen-internal-githook" created="Thu, 20 Apr 2017 18:32:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hptabster&apos;, u&apos;name&apos;: u&apos;Jonathan Abrahams&apos;, u&apos;email&apos;: u&apos;jonathan@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28348&quot; title=&quot;Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28348&quot;&gt;&lt;del&gt;SERVER-28348&lt;/del&gt;&lt;/a&gt; Detect single-process deadlocks involving LockManager locks and/or pthread_mutexes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d4c16656d746c9e7a76579b593c41e48c915025d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d4c16656d746c9e7a76579b593c41e48c915025d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1531253" author="max.hirschhorn@10gen.com" created="Thu, 23 Mar 2017 14:00:02 +0000"  >&lt;p&gt;Until &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28437&quot; title=&quot;Hang analyzer GDB module mongo_lock.py should use a memory based mechanism to discover the locks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28437&quot;&gt;&lt;del&gt;SERVER-28437&lt;/del&gt;&lt;/a&gt; is implemented, the hang analyzer won&apos;t be able to definitively say that a process has a cycle in the waits-for graph. We may want to hold off on this for now until more research into &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28437&quot; title=&quot;Hang analyzer GDB module mongo_lock.py should use a memory based mechanism to discover the locks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28437&quot;&gt;&lt;del&gt;SERVER-28437&lt;/del&gt;&lt;/a&gt; has been done.&lt;/p&gt;

&lt;p&gt;The digraph files generated by the &lt;tt&gt;mongodb&amp;#45;waitsfor&amp;#45;graph&lt;/tt&gt; GDB command appear to be sufficient for Build Barons that I see this as mainly for aided automated de-duplication of failures.&lt;/p&gt;</comment>
                    </comments>
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