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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-86217] Checking if capped snapshot is needed can access collection metadata without synchonrization</title>
                <link>https://jira.mongodb.org/browse/SERVER-86217</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When acquiring resources for an operation, we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38b8f67db5527ab4fade5857c44e91c07fecd801/src/mongo/db/db_raii.cpp#L586-L593&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;check whether we need need to establish a capped snapshot&lt;/a&gt;. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38b8f67db5527ab4fade5857c44e91c07fecd801/src/mongo/db/catalog/collection_impl.cpp#L953&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This check&lt;/a&gt; then &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38b8f67db5527ab4fade5857c44e91c07fecd801/src/mongo/db/catalog/collection_impl.cpp#L1258&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;accesses the collection metadata&lt;/a&gt;. Notably, at this point we are &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38b8f67db5527ab4fade5857c44e91c07fecd801/src/mongo/db/db_raii.cpp#L548&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;using the latest version of the collection catalog&lt;/a&gt; since we haven&apos;t established a snapshot yet. This means that a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38b8f67db5527ab4fade5857c44e91c07fecd801/src/mongo/db/commands/resize_oplog.cpp#L117-L118&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;concurrent operation&lt;/a&gt; can use the same version of the catalog to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38b8f67db5527ab4fade5857c44e91c07fecd801/src/mongo/db/catalog/collection_impl.cpp#L1916&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;write to the collection metadata&lt;/a&gt; concurrently.&lt;/p&gt;</description>
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        <key id="2567286">SERVER-86217</key>
            <summary>Checking if capped snapshot is needed can access collection metadata without synchonrization</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="12452" iconUrl="https://jira.mongodb.org/images/icons/statuses/generic.png" description="">Needs Scheduling</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>
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                <created>Mon, 5 Feb 2024 19:14:40 +0000</created>
                <updated>Tue, 6 Feb 2024 01:01:04 +0000</updated>
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