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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-27973] make ClusterClientCursor own ClusterClientCursorParams and pass the params by reference to RouterStageMerge/ARM</title>
                <link>https://jira.mongodb.org/browse/SERVER-27973</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;ClusterClientCursorParams is currently stored in the AsyncResultsMerger (ARM).&lt;/p&gt;

&lt;p&gt;However, the ARM also has some odd behavior, such as returning the view definition on CommandOnShardedViewNotSupportedOnMongod errors &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.2/src/mongo/s/query/async_results_merger.cpp#L452-L475&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;in a &quot;fake&quot; result&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Then, &lt;tt&gt;cluster_find.cpp::runQueryWithoutRetrying&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.2/src/mongo/s/query/cluster_find.cpp#L257-L263&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;checks for this &quot;fake&quot; result&lt;/a&gt; &lt;em&gt;in addition to checking for an error status&lt;/em&gt;. If the view definition is set on the result, the view definition is passed up along with an error status.&lt;/p&gt;

&lt;p&gt;Instead:&lt;/p&gt;

&lt;p&gt;The logical place for ClusterClientCursorParams to be owned is ClusterClientCursor. ClusterClientCursorParams should be passed by reference down to the ARM.&lt;/p&gt;

&lt;p&gt;Then, rather than using a &quot;fake&quot; result to transmit a view definition from the ARM to &lt;tt&gt;cluster_find.cpp::runQueryWithoutRetrying&lt;/tt&gt;, the view definition should be set in the ClusterClientCursorParams by the ARM, and the ARM should return an error status.&lt;/p&gt;

&lt;p&gt;On seeing this error status, the view definition should be retrieved by &lt;tt&gt;cluster_find.cpp::runQueryWithoutRetrying&lt;/tt&gt; from a new method, ClusterClientCursor::getViewDefinition().&lt;/p&gt;</description>
                <environment></environment>
        <key id="353212">SERVER-27973</key>
            <summary>make ClusterClientCursor own ClusterClientCursorParams and pass the params by reference to RouterStageMerge/ARM</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="9">Done</resolution>
                                        <assignee username="esha.maharishi@mongodb.com">Esha Maharishi</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                            <label>read-only-views</label>
                    </labels>
                <created>Fri, 10 Feb 2017 16:11:37 +0000</created>
                <updated>Wed, 5 Apr 2017 11:43:38 +0000</updated>
                            <resolved>Thu, 16 Feb 2017 22:23:31 +0000</resolved>
                                    <version>3.5.2</version>
                                    <fixVersion>3.5.4</fixVersion>
                                    <component>Querying</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1500583" author="xgen-internal-githook" created="Thu, 16 Feb 2017 22:22:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;EshaMaharishi&apos;, u&apos;name&apos;: u&apos;Esha Maharishi&apos;, u&apos;email&apos;: u&apos;esha.maharishi@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27973&quot; title=&quot;make ClusterClientCursor own ClusterClientCursorParams and pass the params by reference to RouterStageMerge/ARM&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27973&quot;&gt;&lt;del&gt;SERVER-27973&lt;/del&gt;&lt;/a&gt; make ClusterClientCursor own ClusterClientCursorParams and pass the params by reference to RouterStageMerge/ARM&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3352feab5733189d732cfc73053f874011d1cb86&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3352feab5733189d732cfc73053f874011d1cb86&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="352287">SERVER-27937</issuekey>
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