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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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            <title>[SERVER-33558] Remove read preference from AsyncResultsMerger and $mergeCursors</title>
                <link>https://jira.mongodb.org/browse/SERVER-33558</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We believe it is the case that once a cursor is established on a node, the read preference does not play a role. For example, if a read preference &quot;primary&quot; query is sent to the primary and a cursor established, then that cursor can still be iterated if the node steps down between the cursor establishment and the getMore.&lt;/p&gt;

&lt;p&gt;This means we no longer have to track the read preference during getMores, except in the specific case of new queries issued during getMores, such as described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31665&quot; title=&quot;Obey read preference and utilize readConcern during lookup of an update post image during change stream&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31665&quot;&gt;&lt;del&gt;SERVER-31665&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="503741">SERVER-33558</key>
            <summary>Remove read preference from AsyncResultsMerger and $mergeCursors</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="13201">Fixed</resolution>
                                        <assignee username="charlie.swanson@mongodb.com">Charlie Swanson</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                    </labels>
                <created>Wed, 28 Feb 2018 21:25:13 +0000</created>
                <updated>Sun, 29 Oct 2023 22:34:20 +0000</updated>
                            <resolved>Wed, 7 Mar 2018 16:54:36 +0000</resolved>
                                                    <fixVersion>3.7.3</fixVersion>
                                    <component>Aggregation Framework</component>
                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1826200" author="xgen-internal-githook" created="Wed, 7 Mar 2018 16:53:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;charlie.swanson@mongodb.com&apos;, &apos;name&apos;: &apos;Charlie Swanson&apos;, &apos;username&apos;: &apos;cswanson310&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33558&quot; title=&quot;Remove read preference from AsyncResultsMerger and $mergeCursors&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33558&quot;&gt;&lt;del&gt;SERVER-33558&lt;/del&gt;&lt;/a&gt; Remove readPreference from AsyncResultsMerger&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2286d21ea884edf41622d40b068efc92a443b12a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2286d21ea884edf41622d40b068efc92a443b12a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1823724" author="charlie.swanson" created="Mon, 5 Mar 2018 21:38:08 +0000"  >&lt;p&gt;Scheduling this for next sprint after discussion in code review.&lt;/p&gt;</comment>
                            <comment id="1819146" author="charlie.swanson" created="Wed, 28 Feb 2018 21:26:27 +0000"  >&lt;p&gt;I&apos;ve made a test that proves you can getMore a read preference &quot;primary&quot; cursor even when the node is no longer the primary.&lt;/p&gt;</comment>
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