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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-5710] Update may result in doc without shard key</title>
                <link>https://jira.mongodb.org/browse/SERVER-5710</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If you include the shard-key in the query, but it is removed in the update operations, then the resulting inserted document will not contain the shard key, and will be lost to the sharded system queries.&lt;/p&gt;

&lt;p&gt;Mongos should probably build the possibly inserted document to verify the shard-key exists in it before sending the update to the shard.&lt;/p&gt;

&lt;p&gt;Take these examples&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; db.s.update({shardkey:1}, {$unset: {shardkey:1}, $set: {otherfield : 5}}, true)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// other example&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; db.s2.update({&quot;embedded.key&quot;:1}, {$set : {embedded:{not_key:1}}}, true)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="37179">SERVER-5710</key>
            <summary>Update may result in doc without shard key</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="alerner">Alberto Lerner</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                    </labels>
                <created>Wed, 25 Apr 2012 18:35:15 +0000</created>
                <updated>Mon, 11 Jul 2016 18:33:47 +0000</updated>
                            <resolved>Wed, 16 Jan 2013 15:40:40 +0000</resolved>
                                                    <fixVersion>2.4.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="241505" author="auto" created="Wed, 16 Jan 2013 15:40:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-16T15:36:40Z&apos;, u&apos;email&apos;: u&apos;alerner@10gen.com&apos;, u&apos;name&apos;: u&apos;Alberto Lerner&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5710&quot; title=&quot;Update may result in doc without shard key&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5710&quot;&gt;&lt;del&gt;SERVER-5710&lt;/del&gt;&lt;/a&gt; Changed KeyPattern.hasField() sematics to consider dotted field prefixes.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fd1bc4895b51dc65185ac5fa633bb0435860b936&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fd1bc4895b51dc65185ac5fa633bb0435860b936&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="203532" author="renctan" created="Fri, 30 Nov 2012 21:12:30 +0000"  >&lt;p&gt;Current state of master branch, commit 5a4b6a0acc92c171e7b8fd7fecd26585e76b60be:&lt;/p&gt;

&lt;p&gt;First example fails with: Can&apos;t modify shard key&apos;s value. -&amp;gt; fixed&lt;br/&gt;
Second example still gets inserted -&amp;gt; bug&lt;/p&gt;</comment>
                            <comment id="113709" author="scotthernandez" created="Wed, 25 Apr 2012 18:48:06 +0000"  >&lt;p&gt;Probably better to actually move this check to the shard by simply not allow writing to any data which that shard does not own.&lt;/p&gt;

&lt;p&gt;On sharded connections this should enforce that the shard owns the doc, by shard-key, before the write is allowed. On non-sharded connections this should let everything pass.&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="53414">SERVER-7379</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="47961">SERVER-6835</issuekey>
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