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    <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-29669] &apos;parallelCollectionScan&apos; should always return a single cursor for capped collections</title>
                <link>https://jira.mongodb.org/browse/SERVER-29669</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The correctness of opening multiple cursors on a capped collection and reading from them in parallel is potentially problematic and internal support for such an operation is not well defined. Since the &apos;parallelCollectionScan&apos; command is going to be integrated into the initial sync process, for parallel collection cloning, correctness of this command for capped collections is important. Therefore, its behavior should be simplified to always return a single cursor when run against a capped collection, just like a normal &apos;find&apos; command would. &lt;/p&gt;

&lt;p&gt;In the future, parallel scan support for capped collections may be officially added, but until its correctness can be guaranteed, it should be suitable to resort to this simpler approach.&lt;/p&gt;</description>
                <environment></environment>
        <key id="394478">SERVER-29669</key>
            <summary>&apos;parallelCollectionScan&apos; should always return a single cursor for capped collections</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="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="jason.chan@mongodb.com">Jason Chan</assignee>
                                    <reporter username="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jun 2017 18:44:12 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:00 +0000</updated>
                            <resolved>Tue, 25 Jul 2017 14:00:05 +0000</resolved>
                                                    <fixVersion>3.5.11</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1631085" author="xgen-internal-githook" created="Tue, 25 Jul 2017 13:59:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29669&quot; title=&quot;&amp;#39;parallelCollectionScan&amp;#39; should always return a single cursor for capped collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29669&quot;&gt;&lt;del&gt;SERVER-29669&lt;/del&gt;&lt;/a&gt; parallelCollectionScan should always return a single cursor for capped collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4e27af1e980a5f5479fc26a3d616a5b56245261a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4e27af1e980a5f5479fc26a3d616a5b56245261a&lt;/a&gt;&lt;/p&gt;</comment>
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                            <attachment id="160902" name="test_parallelCollectionScan_insertion_order.js" size="4126" author="jason.chan@mongodb.com" created="Thu, 13 Jul 2017 21:49:17 +0000"/>
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