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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-64980] Collectionless $listCatalog should not return catalog entries from non-chunk-owning shards</title>
                <link>https://jira.mongodb.org/browse/SERVER-64980</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the collectionless version of &lt;tt&gt;$listCatalog&lt;/tt&gt; blindly returns all catalog entries from every shard. However, if a shard does not contain any chunks for a given collection, it would be better to exclude the catalog entry from that shard for that collection.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2010092">SERVER-64980</key>
            <summary>Collectionless $listCatalog should not return catalog entries from non-chunk-owning shards</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="gregory.noma@mongodb.com">Gregory Noma</reporter>
                        <labels>
                            <label>car-qw</label>
                    </labels>
                <created>Mon, 28 Mar 2022 13:20:49 +0000</created>
                <updated>Mon, 5 Feb 2024 07:13:11 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5940457" author="gregory.noma" created="Mon, 11 Dec 2023 14:44:47 +0000"  >&lt;p&gt;Even if it&apos;s expensive, my take is that it would still be worth the cost. I think it&apos;s very confusing that the two versions of &lt;tt&gt;$listCatalog&lt;/tt&gt; have different semantics. And certain users of the feature currently have to jump through some hoops of using &lt;em&gt;both&lt;/em&gt; versions of &lt;tt&gt;$listCatalog&lt;/tt&gt; in a dance because of this behavior. In fact the collection-level &lt;tt&gt;$listCatalog&lt;/tt&gt; was only ever added because of this issue.&lt;/p&gt;</comment>
                            <comment id="5926739" author="josef.ahmad" created="Tue, 5 Dec 2023 16:20:40 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=gregory.noma%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;gregory.noma@mongodb.com&quot;&gt;gregory.noma@mongodb.com&lt;/a&gt; apologies for the delay in getting back to you. My initial comment was during triage, where I needed more context.&lt;/p&gt;

&lt;p&gt;I have now observed that the collection-specific listCatalog invocation (e.g. &lt;tt&gt;db.getSiblingDB(&quot;test&quot;).c.aggregate(&lt;span class=&quot;error&quot;&gt;&amp;#91;\{$listCatalog: {}}&amp;#93;&lt;/span&gt;)&lt;/tt&gt;) filters out shards that don&apos;t own any range, unlike the collectionless invocation (&lt;tt&gt;db.getSiblingDB(&quot;admin&quot;).aggregate(&lt;span class=&quot;error&quot;&gt;&amp;#91;\{$listCatalog: {}}&amp;#93;&lt;/span&gt;)&lt;/tt&gt;) which doesn&apos;t seem to do ownership checks on collections.&lt;/p&gt;

&lt;p&gt;We will investigate the cost of adding that logic, although I suspect it could be quite expensive to do it at scale.&lt;/p&gt;</comment>
                            <comment id="5798815" author="gregory.noma" created="Mon, 23 Oct 2023 13:16:48 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=josef.ahmad%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;josef.ahmad@mongodb.com&quot;&gt;josef.ahmad@mongodb.com&lt;/a&gt; could you clarify what you mean by &quot;cluster-wide catalog awareness&quot;?&lt;/p&gt;</comment>
                            <comment id="5798157" author="josef.ahmad" created="Mon, 23 Oct 2023 08:15:10 +0000"  >&lt;p&gt;As part of this ticket we should revisit whether we want to bring cluster-wide catalog awareness to $listCatalog, which has historically been local-only. If not, let&apos;s close it out.&lt;/p&gt;</comment>
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