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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-3608] Sharding on geo sometimes fails due to shard key being too big</title>
                <link>https://jira.mongodb.org/browse/SERVER-3608</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When writing objects with big arrays of geo coords, the writes will often fail with &quot;Shard Key must be less than 512 bytes&quot; error message.&lt;br/&gt;
This only happens in a sharded environment, obviously, when writing to e.g. a single replica set without sharding everything&apos;s fine.&lt;/p&gt;</description>
                <environment></environment>
        <key id="21039">SERVER-3608</key>
            <summary>Sharding on geo sometimes fails due to shard key being too big</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="3">Duplicate</resolution>
                                        <assignee username="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="christian.tonhaeuser@navteq.com">Christian Tonh&#228;user</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Aug 2011 09:55:52 +0000</created>
                <updated>Thu, 6 Apr 2023 18:55:39 +0000</updated>
                            <resolved>Tue, 16 Aug 2011 17:24:41 +0000</resolved>
                                    <version>1.9.1</version>
                                                    <component>Geo</component>
                    <component>Index Maintenance</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="48968" author="christian.tonhaeuser@navteq.com" created="Wed, 17 Aug 2011 07:32:33 +0000"  >&lt;p&gt;Hi Mathias,&lt;/p&gt;

&lt;p&gt;thanks for your reply. Sharding by ID is exactly what we&apos;ll be doing for the time being.&lt;br/&gt;
However, once queries can be routed by geo shard key I&apos;ll have to look for another solution.&lt;/p&gt;</comment>
                            <comment id="48864" author="redbeard0531" created="Tue, 16 Aug 2011 17:24:31 +0000"  >&lt;p&gt;The real issue is that sharding on an array is invalid because a doc could live on more than one shard. Unfortunately we don&apos;t check for this at the moment.&lt;/p&gt;

&lt;p&gt;Also, sharding on geo will probably not do what you want. I&apos;d suggest just sharding on ID.&lt;/p&gt;</comment>
                            <comment id="48776" author="christian.tonhaeuser@navteq.com" created="Tue, 16 Aug 2011 09:58:08 +0000"  >&lt;p&gt;Sorry, forgot something:&lt;br/&gt;
The shard key is defined as &lt;/p&gt;
{&quot;coordinates&quot;:1, &quot;_id&quot;:1}
&lt;p&gt;, with coordinates being an array of spatial coordinates [&lt;span class=&quot;error&quot;&gt;&amp;#91;lon, lat, alt&amp;#93;&lt;/span&gt;,&lt;span class=&quot;error&quot;&gt;&amp;#91;lon,lat,alt&amp;#93;&lt;/span&gt;,...]&lt;br/&gt;
A compound index exists on these fields as well: &lt;/p&gt;
{&quot;coordinates&quot;:&quot;2d&quot;,&quot;_id&quot;:1}</comment>
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