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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-44526] Deadlock in ConfigServerTestFixture::setUpAndInitializeConfigDb</title>
                <link>https://jira.mongodb.org/browse/SERVER-44526</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Scenario:&lt;/p&gt;

&lt;p&gt;T1 = main test thread&lt;br/&gt;
T2 = DistLockPinger thread&lt;/p&gt;

&lt;p&gt;T1 calls ConfigServerTestFixture::setUpAndInitializeConfigDb.&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/f02841245d47c0118f18aa1f1ee88c72ddf012ab/src/mongo/s/config_server_test_fixture.cpp#L121&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;T1 acquired rstl in mode IX, and acquired config db in mode X&lt;/a&gt;.&lt;br/&gt;
T2 tries to get config db in IX, successfully acquired rstl in mode IX but  is blocked for db since T1 has it in mode X.&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/f02841245d47c0118f18aa1f1ee88c72ddf012ab/src/mongo/s/config_server_test_fixture.cpp#L125&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;T1 tries to upgrade rstl to mode X&lt;/a&gt;, gets blocked since T2 has it in mode IX.&lt;/p&gt;

&lt;p&gt;To reproduce, simply add a sleep after acquiring &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f02841245d47c0118f18aa1f1ee88c72ddf012ab/src/mongo/s/config_server_test_fixture.cpp#L121&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;db in mode X&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="994332">SERVER-44526</key>
            <summary>Deadlock in ConfigServerTestFixture::setUpAndInitializeConfigDb</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="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Nov 2019 20:20:29 +0000</created>
                <updated>Sun, 29 Oct 2023 22:15:08 +0000</updated>
                            <resolved>Mon, 11 Nov 2019 23:08:24 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="2528827" author="xgen-internal-githook" created="Mon, 11 Nov 2019 17:28:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;username&apos;: &apos;benety&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44526&quot; title=&quot;Deadlock in ConfigServerTestFixture::setUpAndInitializeConfigDb&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44526&quot;&gt;&lt;del&gt;SERVER-44526&lt;/del&gt;&lt;/a&gt; fix RSTL deadlock in config server test fixture&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/da86ed254a0fb227fe16f2475badf8b2b9cbadcb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/da86ed254a0fb227fe16f2475badf8b2b9cbadcb&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="943441">SERVER-43692</issuekey>
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