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    <title>MongoDB Jira</title>
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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-46991] Create aggregation secondary reads passthrough which runs against a sharded cluster</title>
                <link>https://jira.mongodb.org/browse/SERVER-46991</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46077&quot; title=&quot;Create aggregation_secondary_reads passthrough&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46077&quot;&gt;&lt;del&gt;SERVER-46077&lt;/del&gt;&lt;/a&gt;, we created a new passthrough suite which runs the tests in &lt;tt&gt;jstests/aggregation/&lt;/tt&gt; against a replica set. It configures causal consistency and runs all read operations against a secondary. Our intention was to reuse $out/$merge test coverage to make sure that these operations still work when they run on a replica set secondary.&lt;/p&gt;

&lt;p&gt;Since the implementation of $out/$merge running on a secondary differs depending on whether the cluster is a single replica set or is sharded, we need to get similar test coverage in the sharded case. For this purpose, we should introduce a variant of the &lt;tt&gt;aggregation_secondary_reads&lt;/tt&gt; passthrough which runs against a sharded cluster. I would recommend that we test against a 2-shard cluster (where each shard is a 2-node or 3-node replica set) and that we implicitly shard accessed collections.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1282549">SERVER-46991</key>
            <summary>Create aggregation secondary reads passthrough which runs against a sharded cluster</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="arun.banala@mongodb.com">Arun Banala</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Thu, 19 Mar 2020 17:34:06 +0000</created>
                <updated>Sun, 29 Oct 2023 22:10:33 +0000</updated>
                            <resolved>Tue, 7 Apr 2020 13:35:23 +0000</resolved>
                                                    <fixVersion>4.4.0-rc1</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3033494" author="xgen-internal-githook" created="Thu, 9 Apr 2020 15:46:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Arun Banala&apos;, &apos;email&apos;: &apos;arun.banala@mongodb.com&apos;, &apos;username&apos;: &apos;banarun&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46991&quot; title=&quot;Create aggregation secondary reads passthrough which runs against a sharded cluster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46991&quot;&gt;&lt;del&gt;SERVER-46991&lt;/del&gt;&lt;/a&gt; Create aggregation secondary reads passthrough which runs against a sharded cluster&lt;/p&gt;

&lt;p&gt;(cherry picked from commit b21f611ec6ad54d552386b125533c22466d12388)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/58378211afc8963b7049afe96fd1e6731e620bd9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/58378211afc8963b7049afe96fd1e6731e620bd9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3029063" author="xgen-internal-githook" created="Tue, 7 Apr 2020 13:58:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Arun Banala&apos;, &apos;email&apos;: &apos;arun.banala@mongodb.com&apos;, &apos;username&apos;: &apos;banarun&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46991&quot; title=&quot;Create aggregation secondary reads passthrough which runs against a sharded cluster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46991&quot;&gt;&lt;del&gt;SERVER-46991&lt;/del&gt;&lt;/a&gt; Create aggregation secondary reads passthrough which runs against a sharded cluster&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/883ec759a8a0ce69468b19e501636a740d643c63&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/883ec759a8a0ce69468b19e501636a740d643c63&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1313550">SERVER-47516</issuekey>
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