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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-73931] The &apos;AutoGetCollectionForReadLockFreePITCatalog&apos; utility can mismatch the Sharded and StorEx parts of a collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-73931</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The newly introduced &lt;tt&gt;AutoGetCollectionForReadLockFreePITCatalog&lt;/tt&gt; utility first snapshots the &lt;tt&gt;CollectionPtr&lt;/tt&gt; object from the StorEx catalog and then &lt;a href=&quot;https://github.com/mongodb/mongo/blob/402799d2aed59c1fc41edee1b4a5b54ae9f7d827/src/mongo/db/db_raii.cpp#L1433&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;attaches&lt;/a&gt; it a description. This is incorrect, because while the StorEx catalog can read at a point-in-time, the Sharding one cannot and always returns &quot;latest&quot;. Because of this it is possible that an older collection content can be wrongly paired with a newer description, thus rendering the shard key application nonsensical.&lt;/p&gt;

&lt;p&gt;Until &lt;tt&gt;CSS::getCollectionDescription&lt;/tt&gt; is made timestamp-aware, a check needs to be performed based on the UUID of the collection to ensure that the two can be paired and &lt;tt&gt;SnapshotTooOld&lt;/tt&gt; exception should be thrown.&lt;/p&gt;

&lt;p&gt;Note that in practice, this is not possible to hit, because the Router Role is not going to find a history across drop/recreate so any queries will fail there.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2262730">SERVER-73931</key>
            <summary>The &apos;AutoGetCollectionForReadLockFreePITCatalog&apos; utility can mismatch the Sharded and StorEx parts of a collection</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="13202">Works as Designed</resolution>
                                        <assignee username="henrik.edin@mongodb.com">Henrik Edin</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Mon, 13 Feb 2023 11:29:48 +0000</created>
                <updated>Fri, 27 Oct 2023 13:51:43 +0000</updated>
                            <resolved>Mon, 20 Mar 2023 14:11:08 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5284761" author="xgen-internal-githook" created="Mon, 20 Mar 2023 14:07:21 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;, &apos;username&apos;: &apos;henrikedin&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73931&quot; title=&quot;The &amp;#39;AutoGetCollectionForReadLockFreePITCatalog&amp;#39; utility can mismatch the Sharded and StorEx parts of a collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73931&quot;&gt;&lt;del&gt;SERVER-73931&lt;/del&gt;&lt;/a&gt; Verify that collection UUID matches with sharding&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit daa375e72b57bb45f5913cb60118bdc415400036.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1e6c0f304205c96f91fc4440965c363321f11e4b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1e6c0f304205c96f91fc4440965c363321f11e4b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5243923" author="xgen-internal-githook" created="Thu, 2 Mar 2023 15:37:15 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;, &apos;username&apos;: &apos;henrikedin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73931&quot; title=&quot;The &amp;#39;AutoGetCollectionForReadLockFreePITCatalog&amp;#39; utility can mismatch the Sharded and StorEx parts of a collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73931&quot;&gt;&lt;del&gt;SERVER-73931&lt;/del&gt;&lt;/a&gt; Verify that collection UUID matches with sharding&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/daa375e72b57bb45f5913cb60118bdc415400036&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/daa375e72b57bb45f5913cb60118bdc415400036&lt;/a&gt;&lt;/p&gt;</comment>
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