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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-70408] Migrations for collection undergoing range deletion must not stall in v6.0</title>
                <link>https://jira.mongodb.org/browse/SERVER-70408</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jordi.serra-torrens%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;jordi.serra-torrens@mongodb.com&quot;&gt;jordi.serra-torrens@mongodb.com&lt;/a&gt; for reporting this.&lt;/p&gt;

&lt;p&gt;On v6.0, the &lt;tt&gt;ScopedRangeDeleter&lt;/tt&gt; lock is held while executing the range deletion for a collection &lt;tt&gt;C&lt;/tt&gt;. This lock takes &lt;a href=&quot;https://github.com/mongodb/mongo/blob/faa9a621eb5b40ec830284328bc4ee17f0f51cb9/src/mongo/db/s/balancer_stats_registry.cpp#L73-L76&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this RESOURCE_MUTEX in MODE_X&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;This can lead to stalling concurrent migrations on collection &lt;tt&gt;C&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/29c8d88c97f9878f0d841adc61fcbf6758fca55f/src/mongo/db/s/migration_destination_manager.cpp#L1398-L1399&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, or &lt;a href=&quot;https://github.com/mongodb/mongo/blob/29c8d88c97f9878f0d841adc61fcbf6758fca55f/src/mongo/db/s/migration_destination_manager.cpp#L1861-L1862&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, or &lt;a href=&quot;https://github.com/mongodb/mongo/blob/29c8d88c97f9878f0d841adc61fcbf6758fca55f/src/mongo/db/s/migration_coordinator.cpp#L246-L247&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; until the range deletion task ends.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2155640">SERVER-70408</key>
            <summary>Migrations for collection undergoing range deletion must not stall in v6.0</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="3">Duplicate</resolution>
                                        <assignee username="tommaso.tocci@mongodb.com">Tommaso Tocci</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Mon, 10 Oct 2022 16:40:03 +0000</created>
                <updated>Wed, 30 Nov 2022 17:53:04 +0000</updated>
                            <resolved>Tue, 1 Nov 2022 02:17:12 +0000</resolved>
                                    <version>6.0.2</version>
                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4942877" author="tommaso.tocci" created="Tue, 1 Nov 2022 02:17:12 +0000"  >&lt;p&gt;Fixed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-70864&quot; title=&quot;Get rid of fine grained scoped range deleter lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-70864&quot;&gt;&lt;del&gt;SERVER-70864&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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