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    <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-85884] Make Counters in MultiUpdateCoordinator Unit Test Atomic</title>
                <link>https://jira.mongodb.org/browse/SERVER-85884</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;TSAN &lt;a href=&quot;https://jira.mongodb.org/browse/BF-31605&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;complains&lt;/a&gt; that the &lt;a href=&quot;https://github.com/10gen/mongo/blob/1a8cb45857925d7ce98334feadf2e7514ad9828d/src/mongo/db/s/migration_blocking_operation/multi_update_coordinator_test.cpp#L67-L68&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;counters&lt;/a&gt; in the MultiUpdateCoordinator test fixtures are concurrently read and written. These counters are incremented when MultiUpdateCoordinator &lt;a href=&quot;https://github.com/10gen/mongo/blob/1a8cb45857925d7ce98334feadf2e7514ad9828d/src/mongo/db/s/migration_blocking_operation/multi_update_coordinator.cpp#L167&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;starts&lt;/a&gt; or &lt;a href=&quot;https://github.com/10gen/mongo/blob/1a8cb45857925d7ce98334feadf2e7514ad9828d/src/mongo/db/s/migration_blocking_operation/multi_update_coordinator.cpp#L226&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stops&lt;/a&gt; migrations and are read &lt;a href=&quot;https://github.com/10gen/mongo/blob/1a8cb45857925d7ce98334feadf2e7514ad9828d/src/mongo/db/s/migration_blocking_operation/multi_update_coordinator_test.cpp#L333-L339&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;from the unit test&lt;/a&gt;. Since the instance &lt;a href=&quot;https://github.com/10gen/mongo/blob/1a8cb45857925d7ce98334feadf2e7514ad9828d/src/mongo/db/s/migration_blocking_operation/multi_update_coordinator_test.cpp#L321-L326&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;should be paused&lt;/a&gt; while the unit test reads these values, I think this should be safe, but it&apos;s possible that TSAN doesn&apos;t have the context to realize that the failpoint is being used as synchronization here.&lt;/p&gt;

&lt;p&gt;These counters should be made atomic so TSAN stops complaining, and if there really is a race in the test we&apos;ll see unit test failures due to an unexpected count.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2560227">SERVER-85884</key>
            <summary>Make Counters in MultiUpdateCoordinator Unit Test Atomic</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="brett.nawrocki@mongodb.com">Brett Nawrocki</assignee>
                                    <reporter username="brett.nawrocki@mongodb.com">Brett Nawrocki</reporter>
                        <labels>
                    </labels>
                <created>Mon, 29 Jan 2024 19:24:18 +0000</created>
                <updated>Fri, 2 Feb 2024 19:13:58 +0000</updated>
                            <resolved>Fri, 2 Feb 2024 19:13:58 +0000</resolved>
                                                    <fixVersion>7.3.0-rc2</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="6063427" author="xgen-internal-githook" created="Fri, 2 Feb 2024 18:46:15 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Brett Nawrocki&apos;, &apos;email&apos;: &apos;brett.nawrocki@mongodb.com&apos;, &apos;username&apos;: &apos;brettnawrocki&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-85884&quot; title=&quot;Make Counters in MultiUpdateCoordinator Unit Test Atomic&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-85884&quot;&gt;&lt;del&gt;SERVER-85884&lt;/del&gt;&lt;/a&gt; Make Counters in MultiUpdateCoordinator Unit Test Atomic&lt;/p&gt;

&lt;p&gt;GitOrigin-RevId: 43a4e5c4ece2d05f8fad6e2247a4ca75a0f43d72&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d2bb000cdef205ebea073c6eac5d2fcb2a5ee48a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d2bb000cdef205ebea073c6eac5d2fcb2a5ee48a&lt;/a&gt;&lt;/p&gt;</comment>
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