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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-25610] MigrationManager signals the last migration for a namespace before freeing the collection dist lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-25610</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the MigrationManager schedules multiple concurrent migrations for the same namespace, the first migration to be scheduled will acquire the collection distributed lock and the last one to complete will release it.&lt;/p&gt;

&lt;p&gt;Currently when the last scheduled migration completes, it signals the migration as complete to the caller before releasing the distributed lock, which causes a race condition where an immediately scheduled &apos;moveChunk&apos; command fails because the lock is not released yet.&lt;/p&gt;

&lt;p&gt;We should switch the order so that the last notification is signaled only after the distributed lock has been released.&lt;/p&gt;</description>
                <environment></environment>
        <key id="309040">SERVER-25610</key>
            <summary>MigrationManager signals the last migration for a namespace before freeing the collection dist lock</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="9">Done</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Mon, 15 Aug 2016 17:00:37 +0000</created>
                <updated>Fri, 2 Sep 2016 00:29:12 +0000</updated>
                            <resolved>Tue, 16 Aug 2016 12:09:02 +0000</resolved>
                                    <version>3.3.12</version>
                                    <fixVersion>3.3.12</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1358076" author="xgen-internal-githook" created="Tue, 16 Aug 2016 12:03:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25610&quot; title=&quot;MigrationManager signals the last migration for a namespace before freeing the collection dist lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25610&quot;&gt;&lt;del&gt;SERVER-25610&lt;/del&gt;&lt;/a&gt; Signal last migration for a namespace after freeing the dist lock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0ba055e3c91654d564664a8665dc5ee3bcec72bf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0ba055e3c91654d564664a8665dc5ee3bcec72bf&lt;/a&gt;&lt;/p&gt;</comment>
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