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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-8388] scoped_db_conn_test threading issues</title>
                <link>https://jira.mongodb.org/browse/SERVER-8388</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;causing Nightly Linux 64 to sporadically fail.&lt;/p&gt;

&lt;p&gt;If you run scoped_db_conn_test repeatedly in a while loop, it doesn&apos;t even run for a minute before it crashes on shutdown:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;scoped_db_conn_test: src/third_party/boost/boost/thread/pthread/mutex.hpp:154: void boost::timed_mutex::lock(): Assertion `!pthread_mutex_lock(&amp;amp;m)&apos; failed.&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Aborted (core dumped)&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="63697">SERVER-8388</key>
            <summary>scoped_db_conn_test threading issues</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="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Tue, 29 Jan 2013 20:28:04 +0000</created>
                <updated>Mon, 11 Jul 2016 17:58:46 +0000</updated>
                            <resolved>Thu, 31 Jan 2013 00:01:59 +0000</resolved>
                                    <version>2.3.2</version>
                                    <fixVersion>2.4.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="254269" author="auto" created="Thu, 31 Jan 2013 00:01:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-30T16:35:28Z&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-8388&quot; title=&quot;scoped_db_conn_test threading issues&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-8388&quot;&gt;&lt;del&gt;SERVER-8388&lt;/del&gt;&lt;/a&gt; scoped_db_conn_test threading issues&lt;/p&gt;

&lt;p&gt;Made sure to wait for all listening threads to terminate before finishing one test case.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f8095df93efac80bc8d6ec994abff2d0e0419732&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f8095df93efac80bc8d6ec994abff2d0e0419732&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="253315" author="renctan" created="Tue, 29 Jan 2013 23:57:41 +0000"  >&lt;p&gt;Problem1:&lt;br/&gt;
There can be several handleIncomingMsg thread still running and when it tries to terminate, it can crash when calling (with error: pure virtual method called):&lt;/p&gt;

&lt;p&gt;handler-&amp;gt;disconnected( p.get() );&lt;/p&gt;

&lt;p&gt;because the main thread already died and called the destructor for the file local variable dummyHandler.&lt;/p&gt;

&lt;p&gt;Changing dummyHandler to become a heap variable seems to make this go away.&lt;/p&gt;

&lt;p&gt;Problem2:&lt;br/&gt;
Assertion `!pthread_mutex_destroy(&amp;amp;m)&apos; failed.&lt;/p&gt;

&lt;p&gt;Likely related to Problem1 stacktraces show mutex desctructors being called from handleIncomingMsg.&lt;br/&gt;
Adding static ::mongo::StaticObserver StaticObserver; in unittest_main.cpp doesn&apos;t make this go away.&lt;/p&gt;</comment>
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