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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-16636] Deadlock detection should check cycles for stability or should be disabled</title>
                <link>https://jira.mongodb.org/browse/SERVER-16636</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Our deadlock detector does not check for deadlock stability currently. It is possible that as the graph traversal progresses, locks which we were waiting on earlier get freed and suddenly become waiting on us, becoming counted in the cycle.&lt;/p&gt;

&lt;p&gt;The fix would be to add check for deadlock stability by re-iterating the discovered cycle. Until this is fixed, we cannot use the deadlock deterministically for assertions, only for retries (which is what we already do).&lt;/p&gt;</description>
                <environment></environment>
        <key id="175853">SERVER-16636</key>
            <summary>Deadlock detection should check cycles for stability or should be disabled</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="9">Done</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>FT</label>
                    </labels>
                <created>Mon, 22 Dec 2014 20:35:45 +0000</created>
                <updated>Sat, 19 Sep 2015 00:28:48 +0000</updated>
                            <resolved>Mon, 4 May 2015 22:44:02 +0000</resolved>
                                    <version>3.0.0</version>
                                    <fixVersion>3.0.3</fixVersion>
                    <fixVersion>3.1.3</fixVersion>
                                    <component>Concurrency</component>
                    <component>MMAPv1</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="904831" author="xgen-internal-githook" created="Mon, 4 May 2015 22:45:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16636&quot; title=&quot;Deadlock detection should check cycles for stability or should be disabled&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16636&quot;&gt;&lt;del&gt;SERVER-16636&lt;/del&gt;&lt;/a&gt; Disable deadlock detection during MMAP V1 journal lock upgrade&lt;/p&gt;

&lt;p&gt;(cherry picked from commit ac6f659b82f022280ab4d92fa715fc0e21828c1f)&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f1708aa899f7785d707c6093897143c3bb058505&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f1708aa899f7785d707c6093897143c3bb058505&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="904822" author="xgen-internal-githook" created="Mon, 4 May 2015 22:38:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16636&quot; title=&quot;Deadlock detection should check cycles for stability or should be disabled&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16636&quot;&gt;&lt;del&gt;SERVER-16636&lt;/del&gt;&lt;/a&gt; Disable deadlock detection during MMAP V1 journal lock upgrade&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ac6f659b82f022280ab4d92fa715fc0e21828c1f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ac6f659b82f022280ab4d92fa715fc0e21828c1f&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="201624">SERVER-18303</issuekey>
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            <issuekey id="175703">SERVER-16624</issuekey>
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