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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>[DOCS-13725] &quot;Cursor Snapshot&quot; documentation is outdated and only applies to MMAP</title>
                <link>https://jira.mongodb.org/browse/DOCS-13725</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;p&gt;This &lt;a href=&quot;https://docs.mongodb.com/manual/core/read-isolation-consistency-recency/#cursor-snapshot&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Cursor Snapshot&lt;/a&gt; section on read isolation refers to behavior that only existed in MMAP.&lt;/p&gt;

&lt;p&gt;This paragraph should be deleted since it is no longer applicable:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;If your collection has a field or fields that are never modified, you can use a unique index on this field or these fields so that the query will return each document no more than once. Query with hint() to explicitly force the query to use that index.&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;I think we should replace it with this, instead:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;Queries that use unique indexes can, in some cases, return duplicate values. If a cursor using a unique index interleaves with a delete and insert of documents sharing the same unique value, the cursor may return the same unique value twice, but from different documents.&lt;/p&gt;&lt;/blockquote&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="1386840">DOCS-13725</key>
            <summary>&quot;Cursor Snapshot&quot; documentation is outdated and only applies to MMAP</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="9">Done</resolution>
                                        <assignee username="naomi.pentrel@mongodb.com">Naomi Pentrel</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                    </labels>
                <created>Tue, 23 Jun 2020 14:02:34 +0000</created>
                <updated>Mon, 30 Oct 2023 20:20:55 +0000</updated>
                            <resolved>Tue, 23 Mar 2021 15:23:21 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3679406" author="xgen-internal-githook" created="Tue, 23 Mar 2021 15:27:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Naomi Pentrel&apos;, &apos;email&apos;: &apos;5212232+npentrel@users.noreply.github.com&apos;, &apos;username&apos;: &apos;npentrel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13725&quot; title=&quot;&amp;quot;Cursor Snapshot&amp;quot; documentation is outdated and only applies to MMAP&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13725&quot;&gt;&lt;del&gt;DOCS-13725&lt;/del&gt;&lt;/a&gt; update cursor snapshot documentation&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/a742cc43bc30bf0186e6aa69255f4527ecabdf94&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/a742cc43bc30bf0186e6aa69255f4527ecabdf94&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3679405" author="xgen-internal-githook" created="Tue, 23 Mar 2021 15:27:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Naomi Pentrel&apos;, &apos;email&apos;: &apos;5212232+npentrel@users.noreply.github.com&apos;, &apos;username&apos;: &apos;npentrel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13725&quot; title=&quot;&amp;quot;Cursor Snapshot&amp;quot; documentation is outdated and only applies to MMAP&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13725&quot;&gt;&lt;del&gt;DOCS-13725&lt;/del&gt;&lt;/a&gt; update cursor snapshot documentation&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/a8f23e8d7b70d2a4892ec0ce84ec4033b35bee29&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/a8f23e8d7b70d2a4892ec0ce84ec4033b35bee29&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3679404" author="xgen-internal-githook" created="Tue, 23 Mar 2021 15:27:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Naomi Pentrel&apos;, &apos;email&apos;: &apos;5212232+npentrel@users.noreply.github.com&apos;, &apos;username&apos;: &apos;npentrel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13725&quot; title=&quot;&amp;quot;Cursor Snapshot&amp;quot; documentation is outdated and only applies to MMAP&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13725&quot;&gt;&lt;del&gt;DOCS-13725&lt;/del&gt;&lt;/a&gt; update cursor snapshot documentation&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/1528620be653152a0008378a5591fce74d0a54a7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/1528620be653152a0008378a5591fce74d0a54a7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3679402" author="xgen-internal-githook" created="Tue, 23 Mar 2021 15:27:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Naomi Pentrel&apos;, &apos;email&apos;: &apos;5212232+npentrel@users.noreply.github.com&apos;, &apos;username&apos;: &apos;npentrel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13725&quot; title=&quot;&amp;quot;Cursor Snapshot&amp;quot; documentation is outdated and only applies to MMAP&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13725&quot;&gt;&lt;del&gt;DOCS-13725&lt;/del&gt;&lt;/a&gt; update cursor snapshot documentation&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d00c93d4f6efdaa9cec464acf94223184e43c7b1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d00c93d4f6efdaa9cec464acf94223184e43c7b1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3679401" author="xgen-internal-githook" created="Tue, 23 Mar 2021 15:27:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Naomi Pentrel&apos;, &apos;email&apos;: &apos;5212232+npentrel@users.noreply.github.com&apos;, &apos;username&apos;: &apos;npentrel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13725&quot; title=&quot;&amp;quot;Cursor Snapshot&amp;quot; documentation is outdated and only applies to MMAP&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13725&quot;&gt;&lt;del&gt;DOCS-13725&lt;/del&gt;&lt;/a&gt; update cursor snapshot documentation&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/6b5ad56618001208c287741c41156edd10a6c15f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/6b5ad56618001208c287741c41156edd10a6c15f&lt;/a&gt;&lt;/p&gt;</comment>
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