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    <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-61256] Allow a shardsvr tenant migration recipient to create collections directly on itself</title>
                <link>https://jira.mongodb.org/browse/SERVER-61256</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On shardsvr replica sets, the ShardServerOpObserver&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/d54acf1b792de6f7a8b82e49a1e94a7c24c938b0/src/mongo/db/s/shard_server_op_observer.cpp#L573-L576&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;throws&lt;/a&gt;&#160; CannotImplicitlyCreateCollection when creating a new collection unless the OperationShardingState has _allowCollectionCreation set to true.&lt;/p&gt;

&lt;p&gt;(OperationShardingState is a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d54acf1b792de6f7a8b82e49a1e94a7c24c938b0/src/mongo/db/s/operation_sharding_state.cpp#L38&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;decoration on the OperationContext;&lt;/a&gt; see&#160;&lt;a href=&quot;https://gist.github.com/EshaMaharishi/962ac67912d38a4a3a048fe757db43e8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; for more about decorations.)&lt;/p&gt;

&lt;p&gt;This is so that we as developers are aware of all places collection creation can occur, verify they are synchronized with the database critical section, and explicitly enable them using this &lt;a href=&quot;https://github.com/mongodb/mongo/blob/14cd3f8d8d89a2bdc33374f80ed04d1e326f8fc6/src/mongo/db/s/operation_sharding_state.h#L71-L79&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;guard&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;This ticket is to add the guard where the tenant migration recipient&#160;&lt;a href=&quot;https://github.com/10gen/mongo/blob/b412b37c5409dd991f2d56b36e12e703eb188c14/src/mongo/db/repl/tenant_collection_cloner.cpp#L390&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;creates collections during the bulk clone&lt;/a&gt; (similar to the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d54acf1b792de6f7a8b82e49a1e94a7c24c938b0/src/mongo/db/s/migration_destination_manager.cpp#L1005-L1016&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;guard where the moveChunk recipient creates collections&lt;/a&gt;), so that we can run tenant migrations on shardsvrs.&lt;/p&gt;

&lt;p&gt;This ticket should add a test that a tenant migration succeeds when there is pre-existing data for the tenant on the donor.&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1918493">SERVER-61256</key>
            <summary>Allow a shardsvr tenant migration recipient to create collections directly on itself</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="sophia.tan@mongodb.com">Sophia Tan</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Thu, 4 Nov 2021 19:10:05 +0000</created>
                <updated>Sun, 29 Oct 2023 21:46:28 +0000</updated>
                            <resolved>Thu, 11 Nov 2021 23:57:21 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4184521" author="xgen-internal-githook" created="Thu, 11 Nov 2021 23:07:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sophia Tan&apos;, &apos;email&apos;: &apos;sophia_tll@hotmail.com&apos;, &apos;username&apos;: &apos;sophiatll&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61256&quot; title=&quot;Allow a shardsvr tenant migration recipient to create collections directly on itself&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61256&quot;&gt;&lt;del&gt;SERVER-61256&lt;/del&gt;&lt;/a&gt; Allow a shardsvr tenant migration recipient to create collections directly on itself&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/84d485c25a0d238467048200bb7e894ada67bedc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/84d485c25a0d238467048200bb7e894ada67bedc&lt;/a&gt;&lt;/p&gt;</comment>
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