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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-48972] Keep track of waiting resource in LockerImpl</title>
                <link>https://jira.mongodb.org/browse/SERVER-48972</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/336f6ef884e5407a0d1fc576d8d29e6dedbb2eaa/src/mongo/db/concurrency/lock_state.cpp#L681-L695&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;LockerImpl::getWaitingResource()&lt;/a&gt; has unsynchronized accesses to the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/336f6ef884e5407a0d1fc576d8d29e6dedbb2eaa/src/mongo/db/concurrency/lock_manager_defs.h#L441-L446&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;lock request status&lt;/a&gt; in order to find the waiting resource. To solve this, LockerImpl should keep track of the waiting resource itself so that it doesn&apos;t need to look through the pending requests.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1384075">SERVER-48972</key>
            <summary>Keep track of waiting resource in LockerImpl</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="gregory.noma@mongodb.com">Gregory Noma</assignee>
                                    <reporter username="gregory.noma@mongodb.com">Gregory Noma</reporter>
                        <labels>
                            <label>thread-sanitizer</label>
                    </labels>
                <created>Thu, 18 Jun 2020 18:21:24 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:45 +0000</updated>
                            <resolved>Tue, 23 Jun 2020 19:19:26 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3220415" author="xgen-internal-githook" created="Tue, 23 Jun 2020 19:18:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48972&quot; title=&quot;Keep track of waiting resource in LockerImpl&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48972&quot;&gt;&lt;del&gt;SERVER-48972&lt;/del&gt;&lt;/a&gt; Keep track of waiting resource in LockerImpl&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/56d94a679860c827f8f442675193b9ee2f4d4c49&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/56d94a679860c827f8f442675193b9ee2f4d4c49&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3214791" author="louis.williams" created="Thu, 18 Jun 2020 18:27:48 +0000"  >&lt;p&gt;This might be a dupe of, or similar to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48964&quot; title=&quot;Potential data race in LockRequest.status&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48964&quot;&gt;&lt;del&gt;SERVER-48964&lt;/del&gt;&lt;/a&gt;. I&apos;m not completely sure about the prescribed solution here, because the locker should be able to read its own LockRequests without extra synchronization. That said, getWaitingResource seems to be mostly used in debug assertions and unit tests.&lt;/p&gt;</comment>
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            <issuekey id="1383951">SERVER-48964</issuekey>
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