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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-41943] Validate the given namespace for refineCollectionShardKey</title>
                <link>https://jira.mongodb.org/browse/SERVER-41943</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As described in &lt;a href=&quot;https://docs.google.com/document/d/1X91kPudrOog7sQsrxB7GXTiRe66B4yUSx4rLj5HKvfY/edit#heading=h.ln7z1h6ovhfl&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this section of the design document&lt;/a&gt;, &lt;tt&gt;_configsvrRefineCollectionShardKey&lt;/tt&gt; should validate the following things about the namespace given to refineCollectionShardKey:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;The namespace must be sharded.&lt;/li&gt;
	&lt;li&gt;The namespace must have the same epoch as the router that received&#160;&lt;tt&gt;refineCollectionShardKey&lt;/tt&gt; had in its routing table cache.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Both of these checks should happen after taking distributed locks on the namespace&apos;s database and collection.&lt;/p&gt;

&lt;p&gt;As part of this ticket, an epoch type should be added as a new non-optional field to the &lt;tt&gt;_configsvrRefineCollectionShardKey&lt;/tt&gt; IDL type and mongos should include the epoch of the namespace in its routing table (i.e. ChunkManager) when sending&#160;&lt;tt&gt;_configsvrRefineCollectionShardKey&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;The following test cases should be added to &lt;tt&gt;jstests/sharding/refine_collection_shard_key_basic.js&lt;/tt&gt;:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;A refine will fail if the namespace is not sharded.&lt;/li&gt;
	&lt;li&gt;A refine will fail if the mongos receiving the command believes the given namespace has a different epoch than the namespace currently has (e.g. the namespace has been dropped and re-sharded without the mongos refreshing its metadata).&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="817250">SERVER-41943</key>
            <summary>Validate the given namespace for refineCollectionShardKey</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="jamie.heppenstall@mongodb.com">James Heppenstall</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Wed, 26 Jun 2019 23:11:05 +0000</created>
                <updated>Sun, 29 Oct 2023 22:19:33 +0000</updated>
                            <resolved>Wed, 3 Jul 2019 18:26:11 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2311540" author="xgen-internal-githook" created="Wed, 3 Jul 2019 18:23:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jamie Heppenstall&apos;, &apos;email&apos;: &apos;jamie.heppenstall@mongodb.com&apos;, &apos;username&apos;: &apos;JamesHeppenstall&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-41943&quot; title=&quot;Validate the given namespace for refineCollectionShardKey&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-41943&quot;&gt;&lt;del&gt;SERVER-41943&lt;/del&gt;&lt;/a&gt; Validate the given namespace for refineCollectionShardKey&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/558bc6285f0410c9d48fb491173212408bc6b48d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/558bc6285f0410c9d48fb491173212408bc6b48d&lt;/a&gt;&lt;/p&gt;</comment>
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