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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-6179] Sharded aggregation can&apos;t handle multiple $group commands</title>
                <link>https://jira.mongodb.org/browse/SERVER-6179</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The current implementation assumes that when running in mongos it should be merging results from the shards. While this applies to the first $group, it doesn&apos;t apply to any others.&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;Note that both stages in the pipeline work by themselves and should return each document unmodified. Also, the combined aggregation works when running on a single server.&lt;/p&gt;</description>
                <environment></environment>
        <key id="42167">SERVER-6179</key>
            <summary>Sharded aggregation can&apos;t handle multiple $group commands</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="matt.dannenberg">Matt Dannenberg</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Fri, 22 Jun 2012 21:04:18 +0000</created>
                <updated>Mon, 11 Jul 2016 18:34:38 +0000</updated>
                            <resolved>Mon, 23 Jul 2012 14:04:03 +0000</resolved>
                                                    <fixVersion>2.2.0-rc1</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="145609" author="auto" created="Fri, 20 Jul 2012 22:49:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-07-09T12:55:14-07:00&apos;, u&apos;email&apos;: u&apos;dannenberg.matt@gmail.com&apos;, u&apos;name&apos;: u&apos;Matt Dannenberg&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6179&quot; title=&quot;Sharded aggregation can&amp;#39;t handle multiple $group commands&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6179&quot;&gt;&lt;del&gt;SERVER-6179&lt;/del&gt;&lt;/a&gt; support multiple $group in sharded agg&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dc0b517d81bc01565e3819493c7379182b5625b3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dc0b517d81bc01565e3819493c7379182b5625b3&lt;/a&gt;&lt;/p&gt;</comment>
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