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    <title>MongoDB Jira</title>
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    <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-1873] group can only process 10k unique keys</title>
                <link>https://jira.mongodb.org/browse/SERVER-1873</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>
&lt;p&gt;db.SOURCE.group(&lt;br/&gt;
{&lt;br/&gt;
 key: &lt;/p&gt;
{&apos;userid&apos;: true}
&lt;p&gt;, &lt;br/&gt;
 initial: &lt;/p&gt;
{sum: 0}
&lt;p&gt;, &lt;br/&gt;
 reduce: function(doc, prev) &lt;/p&gt;
{ prev.sum += 1}
&lt;p&gt;});&lt;/p&gt;


&lt;p&gt;Wed Sep 29 11:16:50 uncaught exception: group command failed: {&lt;br/&gt;
	&quot;errmsg&quot; : &quot;exception: group() can&apos;t handle more than 10000 unique keys&quot;,&lt;br/&gt;
	&quot;code&quot; : 10043,&lt;br/&gt;
	&quot;ok&quot; : 0&lt;br/&gt;
}&lt;/p&gt;</description>
                <environment></environment>
        <key id="13220">SERVER-1873</key>
            <summary>group can only process 10k unique keys</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="-1">Unassigned</assignee>
                                    <reporter username="kgorman">Kenny Gorman</reporter>
                        <labels>
                    </labels>
                <created>Wed, 29 Sep 2010 18:18:51 +0000</created>
                <updated>Tue, 12 Jul 2016 00:18:46 +0000</updated>
                            <resolved>Fri, 17 Dec 2010 04:48:47 +0000</resolved>
                                    <version>1.6.2</version>
                                    <fixVersion>1.7.4</fixVersion>
                                                        <votes>1</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="21503" author="auto" created="Fri, 17 Dec 2010 04:50:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;erh&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: up to 20k keys for group &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1873&quot; title=&quot;group can only process 10k unique keys&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1873&quot;&gt;&lt;del&gt;SERVER-1873&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bb94161851e3222a95a1455e08c8b6d11d2615c3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bb94161851e3222a95a1455e08c8b6d11d2615c3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="21502" author="eliot" created="Fri, 17 Dec 2010 04:48:47 +0000"  >&lt;p&gt;bson size is now 16mb, so size is higher.&lt;/p&gt;

&lt;p&gt;also, i think this: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-447&quot; title=&quot;new aggregation framework&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-447&quot;&gt;&lt;del&gt;SERVER-447&lt;/del&gt;&lt;/a&gt; is what you really want.&lt;/p&gt;</comment>
                            <comment id="18673" author="eliot" created="Wed, 29 Sep 2010 20:05:34 +0000"  >&lt;p&gt;group is inherently limited to the max bson document size&lt;br/&gt;
if we increase bson size - this will go up as well&lt;br/&gt;
will leave as a marker to remember to change it in conjuction&lt;/p&gt;</comment>
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