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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-12513] Opening 2.6 DB with 2.4 creates unique index on admin.system.users</title>
                <link>https://jira.mongodb.org/browse/SERVER-12513</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Opening a 2.6 DB with 2.4 creates a unique index on the admin.system.users collection that prevents adding multiple users with the same name to different DBs when reopening in 2.6.&lt;/p&gt;

&lt;p/&gt;
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&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;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 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;{ &quot;v&quot; : 1, &quot;key&quot; : { &quot;user&quot; : 1, &quot;userSource&quot; : 1 }, &quot;unique&quot; : true, &quot;ns&quot; : &quot;admin.system.users&quot;, &quot;name&quot; : &quot;user_1_userSource_1&quot; }&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;This could be fixed by automatically deleting such an index if the user doc version is &amp;gt;= 3.&lt;/p&gt;</description>
                <environment></environment>
        <key id="108044">SERVER-12513</key>
            <summary>Opening 2.6 DB with 2.4 creates unique index on admin.system.users</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="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="andreas.nilsson">Andreas Nilsson</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Tue, 28 Jan 2014 20:49:14 +0000</created>
                <updated>Mon, 11 Jul 2016 17:18:14 +0000</updated>
                            <resolved>Fri, 7 Feb 2014 18:39:13 +0000</resolved>
                                    <version>2.5.4</version>
                                    <fixVersion>2.6.0-rc0</fixVersion>
                                    <component>Security</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="495367" author="xgen-internal-githook" created="Fri, 7 Feb 2014 18:38:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;stbrody&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;, u&apos;email&apos;: u&apos;spencer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12513&quot; title=&quot;Opening 2.6 DB with 2.4 creates unique index on admin.system.users&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12513&quot;&gt;&lt;del&gt;SERVER-12513&lt;/del&gt;&lt;/a&gt; At startup, if a 2.4-style index on admin.system.users is detected, remove it&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/749126d5ea0f59828c370880f1b3fba3395015d5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/749126d5ea0f59828c370880f1b3fba3395015d5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="490821" author="xgen-internal-githook" created="Thu, 30 Jan 2014 15:54:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@10gen.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12513&quot; title=&quot;Opening 2.6 DB with 2.4 creates unique index on admin.system.users&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12513&quot;&gt;&lt;del&gt;SERVER-12513&lt;/del&gt;&lt;/a&gt; If a 2.4-style index on admin.system.users is detected, remove it&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 36c3d951c28cf752789cf881089f3a1683974ac8.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6a96bab90ebf69d5df1ca120e31599933c910a89&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6a96bab90ebf69d5df1ca120e31599933c910a89&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="490599" author="xgen-internal-githook" created="Thu, 30 Jan 2014 01:09:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;stbrody&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;, u&apos;email&apos;: u&apos;spencer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12513&quot; title=&quot;Opening 2.6 DB with 2.4 creates unique index on admin.system.users&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12513&quot;&gt;&lt;del&gt;SERVER-12513&lt;/del&gt;&lt;/a&gt; If a 2.4-style index on admin.system.users is detected, remove it&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/36c3d951c28cf752789cf881089f3a1683974ac8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/36c3d951c28cf752789cf881089f3a1683974ac8&lt;/a&gt;&lt;/p&gt;</comment>
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&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;
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					&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; use admin&lt;/span&gt;&lt;/pre&gt;
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						&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;&amp;gt; db.system.users.find()&lt;/span&gt;&lt;/pre&gt;
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				&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;&amp;gt; db.createUser({user:&quot;user&quot;,pwd:&quot;pwd&quot;,roles:[]})&lt;/span&gt;&lt;/pre&gt;
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						&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;Successfully added user: { &quot;user&quot; : &quot;user&quot;, &quot;roles&quot; : [ ] }&lt;/span&gt;&lt;/pre&gt;
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					&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;&amp;gt; use test&lt;/span&gt;&lt;/pre&gt;
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						&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;switched to db test&lt;/span&gt;&lt;/pre&gt;
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