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    <title>MongoDB Jira</title>
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    <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-48687] ReplicationCoordinatorMock is not thread safe and causes errors with tsan</title>
                <link>https://jira.mongodb.org/browse/SERVER-48687</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/google/sanitizers/wiki/ThreadSanitizerCppManual&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;tsan&lt;/a&gt; is a data race detection tool that detects write/read races. When running db_s_collection_sharding_runtime_test binary, the ReplicationCoordinatorMock class reads and writes &lt;a href=&quot;https://github.com/mongodb/mongo/blob/05aacade41bf56bdb7a2ab9abba72cff89fc1ac5/src/mongo/db/repl/replication_coordinator_mock.h#L370&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_myLastAppliedOpTime&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/05aacade41bf56bdb7a2ab9abba72cff89fc1ac5/src/mongo/db/repl/replication_coordinator_mock.h#L371&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_myLastAppliedWallTime&lt;/a&gt; without any synchronization mechanism, which causes this race.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1376965">SERVER-48687</key>
            <summary>ReplicationCoordinatorMock is not thread safe and causes errors with tsan</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="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</assignee>
                                    <reporter username="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</reporter>
                        <labels>
                            <label>thread-sanitizer</label>
                    </labels>
                <created>Wed, 10 Jun 2020 10:19:57 +0000</created>
                <updated>Sun, 29 Oct 2023 22:07:14 +0000</updated>
                            <resolved>Thu, 18 Jun 2020 18:22:05 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3214429" author="xgen-internal-githook" created="Thu, 18 Jun 2020 16:05:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jos&#233; Grillo Ram&#237;rez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48687&quot; title=&quot;ReplicationCoordinatorMock is not thread safe and causes errors with tsan&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48687&quot;&gt;&lt;del&gt;SERVER-48687&lt;/del&gt;&lt;/a&gt; Added mutex to coordinator mock to prevent tsan errors that are not actually logical problems but benign data races&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/afb48b7c57718194bd7da1f93b5c4646cac819a0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/afb48b7c57718194bd7da1f93b5c4646cac819a0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3205585" author="acm" created="Thu, 11 Jun 2020 17:23:17 +0000"  >&lt;p&gt;There are multiple TSAN unit tests that are failing because of this. Fixing it would move us much closer to a green unit test run with TSAN.&lt;/p&gt;</comment>
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            <issuekey id="1378642">SERVER-48734</issuekey>
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