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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-8830] Able to modify component of shard key</title>
                <link>https://jira.mongodb.org/browse/SERVER-8830</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The test below fails with &lt;br/&gt;
assert: &lt;span class=&quot;error&quot;&gt;&amp;#91;null&amp;#93;&lt;/span&gt; != &lt;span class=&quot;error&quot;&gt;&amp;#91;null&amp;#93;&lt;/span&gt; are equal : undefined&lt;br/&gt;
Error: Printing Stack Trace&lt;br/&gt;
    at printStackTrace (src/mongo/shell/utils.js:37:7)&lt;br/&gt;
    at doassert (src/mongo/shell/assert.js:6:1)&lt;br/&gt;
    at Function.assert.neq (src/mongo/shell/assert.js:44:1)&lt;br/&gt;
    at c:\Users\sridhar\Desktop\ShardKeyModify.js:54:8&lt;/p&gt;

&lt;p&gt;Expect the document to be unchanged &lt;br/&gt;
{ &quot;_id&quot; : -1, &quot;ckey&quot; : &lt;/p&gt;
{ &quot;key1&quot; : -1, &quot;key2&quot; : -1 }
&lt;p&gt;, &quot;val&quot; : -1 }&lt;br/&gt;
Instead the update goes through resulting in&lt;br/&gt;
{ &quot;_id&quot; : -1, &quot;ckey&quot; : &lt;/p&gt;
{ &quot;key1&quot; : -1, &quot;key2&quot; : -101 }
&lt;p&gt;, &quot;val&quot; : -101 }&lt;/p&gt;

&lt;p&gt;Similarly the following change should not go through &lt;br/&gt;
coll2Sh.update({ckey:{key1:-2, key2:-2}},{$set:{&apos;ckey.key2&apos;:-100, val:-100}})&lt;br/&gt;
So instead of the document remaining unchanged as&lt;br/&gt;
{ &quot;_id&quot; : -2, &quot;ckey&quot; : &lt;/p&gt;
{ &quot;key1&quot; : -2, &quot;key2&quot; : -2 }
&lt;p&gt;, &quot;val&quot; : -2 }&lt;br/&gt;
it is updated to&lt;br/&gt;
{ &quot;_id&quot; : -2, &quot;ckey&quot; : &lt;/p&gt;
{ &quot;key1&quot; : -2, &quot;key2&quot; : -100 }
&lt;p&gt;, &quot;val&quot; : -100 }&lt;/p&gt;

&lt;p&gt;But as expected the following results in an error&lt;br/&gt;
coll2Sh.update({ckey:{key1:-3, key2:-3}},{$set:{ckey:&lt;/p&gt;
{key1:-300,key2:-300}
&lt;p&gt;, val:-100}})&lt;br/&gt;
Can&apos;t modify shard key&apos;s value. field: ckey: &lt;/p&gt;
{ key1: -300.0, key2: -300.0 }
&lt;p&gt; collection: _&lt;em&gt;unknown_name&lt;/em&gt;_.coll2Sharded&lt;/p&gt;</description>
                <environment>2.4.0-rc1 build on Windows 7</environment>
        <key id="67059">SERVER-8830</key>
            <summary>Able to modify component of 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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="sridhar">Sridhar Nanjundeswaran</reporter>
                        <labels>
                    </labels>
                <created>Sat, 2 Mar 2013 01:11:04 +0000</created>
                <updated>Fri, 8 Mar 2013 15:56:12 +0000</updated>
                            <resolved>Mon, 4 Mar 2013 18:55:27 +0000</resolved>
                                    <version>2.4.0-rc1</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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                            <issuelinktype id="10010">
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                                        <issuelink>
            <issuekey id="53414">SERVER-7379</issuekey>
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