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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-23955] Return what host the Shard::runCommand actually ran on</title>
                <link>https://jira.mongodb.org/browse/SERVER-23955</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add a HostAndPort &apos;target&apos; field to Shard::CommandResponse.&lt;/p&gt;</description>
                <environment></environment>
        <key id="282900">SERVER-23955</key>
            <summary>Return what host the Shard::runCommand actually ran on</summary>
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                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-cluster-scalability">Backlog - Cluster Scalability</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                            <label>AdiZ</label>
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                <created>Wed, 27 Apr 2016 20:49:22 +0000</created>
                <updated>Tue, 12 Dec 2023 15:49:05 +0000</updated>
                                                                            <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1285594" author="spencer" created="Mon, 6 Jun 2016 20:11:01 +0000"  >&lt;p&gt;Moving to 3.3 Desired to match the tickets that prompted this work.&lt;/p&gt;</comment>
                            <comment id="1285552" author="charlie.swanson" created="Mon, 6 Jun 2016 19:50:42 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=spencer&quot; class=&quot;user-hover&quot; rel=&quot;spencer&quot;&gt;spencer&lt;/a&gt;, yes. I think it is still needed. &lt;/p&gt;

&lt;p&gt;As we discussed, I think this is needed to get out of our old-style command forwarding &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.3.6/src/mongo/s/commands/cluster_pipeline_cmd.cpp#L397-L402&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. We need the information about which host it executed on in order to know where to send the getMore. I think we wanted to get out of this old-style forwarding as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22760&quot; title=&quot;Sharded aggregation pipelines which involve taking a simple union should merge on mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22760&quot;&gt;&lt;del&gt;SERVER-22760&lt;/del&gt;&lt;/a&gt; or &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-18940&quot; title=&quot;Optimise sharded aggregations that are targeted to a single shard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18940&quot;&gt;&lt;del&gt;SERVER-18940&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;You mentioned that this might be easy enough that someone on the query team could do it. I&apos;ll leave it assigned to you in case you get around to it, but future readers of this comment should keep that in mind.&lt;/p&gt;</comment>
                            <comment id="1282895" author="spencer" created="Thu, 2 Jun 2016 20:41:19 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson&quot;&gt;charlie.swanson&lt;/a&gt;, this ticket was added because &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=benjamin.murphy&quot; class=&quot;user-hover&quot; rel=&quot;benjamin.murphy&quot;&gt;benjamin.murphy&lt;/a&gt; thought it would be needed for some work happening in aggregation.  Do you know if this is still something you expect to need for 3.4?&lt;/p&gt;</comment>
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            <issuekey id="266763">SERVER-22760</issuekey>
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