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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-40859] Orphaned collections after a movePrimary that fails to cleanup can cause future migrations to fail</title>
                <link>https://jira.mongodb.org/browse/SERVER-40859</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If the movePrimary command is interrupted after it successfully runs configsvrCommitMovePrimary but before it finishes dropping all the cloned collections, they can cause errors when chunks for those collections eventually get moved to this shard. This is because movePrimary assigns new UUID to the cloned collections and the UUIDs for the &quot;orphaned&quot; collections and the new sharded collections will be different.&lt;/p&gt;</description>
                <environment></environment>
        <key id="746260">SERVER-40859</key>
            <summary>Orphaned collections after a movePrimary that fails to cleanup can cause future migrations to fail</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="backlog-server-sharding-emea">[DO NOT USE] Backlog - Sharding EMEA</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>moveprimary-resiliency</label>
                            <label>pm-1051-legacy-tickets</label>
                            <label>sharding-causes-bfs-hard</label>
                    </labels>
                <created>Fri, 26 Apr 2019 19:07:44 +0000</created>
                <updated>Fri, 13 Jan 2023 14:52:25 +0000</updated>
                            <resolved>Fri, 13 Jan 2023 14:51:07 +0000</resolved>
                                    <version>4.1.10</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="5111744" author="tommaso.tocci" created="Fri, 13 Jan 2023 14:52:14 +0000"  >&lt;p&gt;This problem have been fixed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71202&quot; title=&quot;Adapt existing movePrimary logic to new DDL coordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71202&quot;&gt;&lt;del&gt;SERVER-71202&lt;/del&gt;&lt;/a&gt;. Please defer to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71202&quot; title=&quot;Adapt existing movePrimary logic to new DDL coordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71202&quot;&gt;&lt;del&gt;SERVER-71202&lt;/del&gt;&lt;/a&gt; for any other information about the fix.&lt;/p&gt;</comment>
                            <comment id="5108789" author="JIRAUSER1259062" created="Thu, 12 Jan 2023 13:43:01 +0000"  >&lt;p&gt;The problem here described is resolved with the resilient &lt;tt&gt;movePrimary&lt;/tt&gt;, which will be introduced in 7.0 version. In case of interruption before to drop the cloned collections, the DDL coordinator resumes the failed phase thus ensuring the removal of the local stale data.&lt;/p&gt;

&lt;p&gt;Currently there is no plan to backport the resilient &lt;tt&gt;movePrimary&lt;/tt&gt;, so lower versions are still affected by the problem.&lt;/p&gt;</comment>
                            <comment id="4676190" author="kaloian.manassiev" created="Wed, 13 Jul 2022 11:08:00 +0000"  >&lt;p&gt;CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=antonio.fuschetto%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;antonio.fuschetto@mongodb.com&quot;&gt;antonio.fuschetto@mongodb.com&lt;/a&gt; who I believe is working in that area now.&lt;/p&gt;</comment>
                            <comment id="4676089" author="tommaso.tocci" created="Wed, 13 Jul 2022 09:58:56 +0000"  >&lt;p&gt;According to &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev@mongodb.com&quot;&gt;kaloian.manassiev@mongodb.com&lt;/a&gt; this will be fixed as part of PM-2144, in which the movePrimary coordinator will be restructure to be resilient to stepdowns&lt;/p&gt;</comment>
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