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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-1470] Update w/upsert ignores dbref field from query on insert</title>
                <link>https://jira.mongodb.org/browse/SERVER-1470</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&amp;gt; db.test.remove()&lt;br/&gt;
&amp;gt; db.test.update({ &quot;name&quot; : &quot;first&quot; , &quot;pic&quot; : { &quot;$ref&quot; : &quot;Pic&quot;, &quot;$id&quot; : ObjectId(&quot;4c48d04cd33a5a92628c9af6&quot;) }}, {$set:{}}, true, true)&lt;br/&gt;
&amp;gt; db.test.find()&lt;/p&gt;
{ &quot;_id&quot; : ObjectId(&quot;4c48d2c9280e000000004377&quot;), &quot;name&quot; : &quot;first&quot; }

&lt;p&gt;The pic field is not saved; The actual update is more complicated but this is reduced to the minimum.&lt;/p&gt;

&lt;p&gt;This was originally a problem from the 2.0 java driver but I doubt that has any bearing on the server.&lt;/p&gt;</description>
                <environment></environment>
        <key id="12525">SERVER-1470</key>
            <summary>Update w/upsert ignores dbref field from query on insert</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                    </labels>
                <created>Thu, 22 Jul 2010 23:33:11 +0000</created>
                <updated>Tue, 12 Jul 2016 00:20:03 +0000</updated>
                            <resolved>Sat, 2 Jun 2012 21:33:05 +0000</resolved>
                                    <version>1.4.4</version>
                    <version>1.5.5</version>
                                    <fixVersion>2.1.2</fixVersion>
                                    <component>Write Ops</component>
                                        <votes>6</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="125414" author="auto" created="Sat, 2 Jun 2012 21:32:44 +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: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1470&quot; title=&quot;Update w/upsert ignores dbref field from query on insert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1470&quot;&gt;&lt;del&gt;SERVER-1470&lt;/del&gt;&lt;/a&gt; fix upsert with dbref&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f5fa68b120c00b0ccd9dbc95fe18502eb490feba&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f5fa68b120c00b0ccd9dbc95fe18502eb490feba&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="81637" author="count" created="Mon, 23 Jan 2012 15:34:09 +0000"  >&lt;p&gt;This bug appears to be able to cause corruption of the shard chunk map when a DBRef is part of the shard key and an upsert is used. I think the mongos is routing the command to a particular shard based on the query doc in the update command, but this bug prevents all the query fields from being stored in the resulting document, so the resulting shard key may reside in a chunk that is supposed to be on another shard. Then when a chunk split happens, it may result in a bad chunk split and corrupt the chunk map. I think this is a similar problem for sharding as if you were to insert a document directly to a shard node rather than going through a mongos.&lt;/p&gt;

&lt;p&gt;This mongodb-user group posting discusses this issue in a little more detail: &lt;a href=&quot;https://groups.google.com/forum/#!topic/mongodb-user/yTVVIpFr1dY&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://groups.google.com/forum/#!topic/mongodb-user/yTVVIpFr1dY&lt;/a&gt;&lt;/p&gt;</comment>
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                <issuelinks>
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                    <name>Duplicate</name>
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                                        <issuelink>
            <issuekey id="17595">SERVER-3158</issuekey>
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