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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-40485] MigrationManager::_schedule should handle TaskExecutor join/cancel</title>
                <link>https://jira.mongodb.org/browse/SERVER-40485</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;See &lt;a href=&quot;https://github.com/mongodb/mongo/blob/1b75c7b9b1295fa8a94552da7f2c63cbc2cc2105/src/mongo/db/s/balancer/migration_manager.cpp#L523&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. It looks like this code will go ahead with trying to complete a migration even during shutdown. The use of ThreadClient might potentially trigger &lt;a href=&quot;https://github.com/mongodb/mongo/blob/1b75c7b9b1295fa8a94552da7f2c63cbc2cc2105/src/mongo/db/client.cpp#L160&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this invariant&lt;/a&gt; during the join of the TaskExecutor.&lt;/p&gt;</description>
                <environment></environment>
        <key id="729921">SERVER-40485</key>
            <summary>MigrationManager::_schedule should handle TaskExecutor join/cancel</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="blake.oler@mongodb.com">Blake Oler</assignee>
                                    <reporter username="ben.caimano@mongodb.com">Benjamin Caimano</reporter>
                        <labels>
                    </labels>
                <created>Thu, 4 Apr 2019 20:44:28 +0000</created>
                <updated>Fri, 17 May 2019 15:32:23 +0000</updated>
                            <resolved>Fri, 17 May 2019 15:32:23 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
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                            <comment id="2250454" author="ben.caimano" created="Fri, 17 May 2019 15:32:23 +0000"  >&lt;p&gt;Talked it over with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=blake.oler&quot; class=&quot;user-hover&quot; rel=&quot;blake.oler&quot;&gt;blake.oler&lt;/a&gt;, it turns out that after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40795&quot; title=&quot;Always execute ThreadPoolTaskExecutor callbacks on thread pool threads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40795&quot;&gt;&lt;del&gt;SERVER-40795&lt;/del&gt;&lt;/a&gt; this won&apos;t be an issue anymore. This uses the Grid TaskExecutorPool&apos;s fixed executor which is a ShardingTaskExecutor. ShardingTaskExecutor wraps ThreadPoolTaskExecutor which now guarantees that all callbacks will be run OutOfLine. There are a lot of hops here, an uncomfortable amount really. Still, it should be safe in the 4.2 world.&lt;/p&gt;</comment>
                            <comment id="2219500" author="kaloian.manassiev" created="Fri, 19 Apr 2019 18:35:04 +0000"  >&lt;p&gt;4.1 Required because this can lead to crash on shutdown.&lt;/p&gt;</comment>
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