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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-7394] &apos;movePrimary&apos; should issue a warning if data exists in the database being moved</title>
                <link>https://jira.mongodb.org/browse/SERVER-7394</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is an extension to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3562&quot; title=&quot;moveprimary moves all databases, including sharded collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3562&quot;&gt;&lt;del&gt;SERVER-3562&lt;/del&gt;&lt;/a&gt;.  That fix caused the &apos;movePrimary&apos; command to not move any collection data for sharded collections.  Because &apos;movePrimary&apos; (or &apos;clone&apos;) does not take out a write lock, it is possible for users to try to write to that collection while the clone is in-flight.  If they do so before the metadata is updated, the writes can be lost.&lt;/p&gt;

&lt;p&gt;The long-term fix would be to lock all of the collections being moved by &apos;clone&apos;.  As a short-term fix, I&apos;d suggest having &apos;movePrimary&apos; return a warning if it detects any unsharded collections in the database being moved.&lt;/p&gt;</description>
                <environment></environment>
        <key id="53510">SERVER-7394</key>
            <summary>&apos;movePrimary&apos; should issue a warning if data exists in the database being moved</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="-1">Unassigned</assignee>
                                    <reporter username="william.zola@10gen.com">William Zola</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Oct 2012 22:50:17 +0000</created>
                <updated>Tue, 13 Aug 2013 08:53:31 +0000</updated>
                            <resolved>Mon, 11 Mar 2013 15:51:40 +0000</resolved>
                                                                                        <votes>1</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="401749" author="remonvv" created="Tue, 13 Aug 2013 08:53:31 +0000"  >&lt;p&gt;Is there an open issue for the long term fix suggested here?&lt;/p&gt;</comment>
                            <comment id="286318" author="scotthernandez" created="Mon, 11 Mar 2013 15:51:40 +0000"  >&lt;p&gt;&quot;movePrimary&quot; needs to move unsharded collections (with data) in the source database/shard to a new shard. Your request directly contradicts the purpose of the &quot;movePrimary&quot; command.&lt;/p&gt;</comment>
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