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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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            <title>[SERVER-40619] Coverity analysis defect 112447: Thread deadlock</title>
                <link>https://jira.mongodb.org/browse/SERVER-40619</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Threads may try to acquire two locks in different orders, potentially causing deadlock&lt;/p&gt;

&lt;p&gt;Defect 112447 (STATIC_C)&lt;br/&gt;
  Checker ORDER_REVERSAL (subcategory none)&lt;br/&gt;
  File:  &lt;tt&gt;/src/mongo/util/background_thread_clock_source.cpp&lt;/tt&gt;&lt;br/&gt;
  Function &lt;tt&gt;mongo::BackgroundThreadClockSource::_updateClockAndWakeTimerIfNeeded()&lt;/tt&gt;&lt;/p&gt;
</description>
                <environment></environment>
        <key id="737526">SERVER-40619</key>
            <summary>Coverity analysis defect 112447: Thread deadlock</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="mira.carey@mongodb.com">Mira Carey</assignee>
                                    <reporter username="xgen-internal-coverity">Coverity Collector User</reporter>
                        <labels>
                            <label>coverity</label>
                    </labels>
                <created>Fri, 12 Apr 2019 16:59:48 +0000</created>
                <updated>Fri, 12 Apr 2019 17:22:44 +0000</updated>
                            <resolved>Fri, 12 Apr 2019 17:16:05 +0000</resolved>
                                                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2211595" author="milkie" created="Fri, 12 Apr 2019 17:22:44 +0000"  >&lt;p&gt;What kind of a static analyzer would it be if it couldn&apos;t do that? =)&lt;/p&gt;</comment>
                            <comment id="2211582" author="jason.carey" created="Fri, 12 Apr 2019 17:15:38 +0000"  >&lt;p&gt;This would only be a problem if we used the BackgroundThreadClockSource with the AutoAdvancingClockSourceMock.  In production we use the BackgroundThreadClockSource with a real system clock source.  In the BTCS test, we use it with a regular clock source mock.  I don&apos;t think it&apos;s a problem that you can&apos;t use these two types together (and I&apos;m impressed/horrified that coverity can apparently match up call sites with all possible base classes it can find definitions for)&lt;/p&gt;</comment>
                            <comment id="2211551" author="milkie" created="Fri, 12 Apr 2019 17:01:06 +0000"  >&lt;p&gt;I think this is saying that if you were to try to use the BackgroundThreadClockSource with the ClockSourceMock (e.g. in a unit test), you would self-deadlock.&lt;/p&gt;</comment>
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