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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-4954] Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs</title>
                <link>https://jira.mongodb.org/browse/SERVER-4954</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Preparation: Create a database named &quot;&lt;span class=&quot;error&quot;&gt;&amp;#91;a-z&amp;#93;&lt;/span&gt;+&quot; and create a collection name &quot;test&quot; and shard it.&lt;/p&gt;

&lt;p&gt;From the mongo shell (connected to mongos):&lt;/p&gt;

&lt;p&gt;1. db.getSiblingDB(&quot;&lt;span class=&quot;error&quot;&gt;&amp;#91;a-z&amp;#93;&lt;/span&gt;+&quot;).dropDatabase();&lt;br/&gt;
2. use config&lt;br/&gt;
3. db.databases.find() // &lt;span class=&quot;error&quot;&gt;&amp;#91;a-z&amp;#93;&lt;/span&gt;+ is not listed -&amp;gt; OK&lt;br/&gt;
4. db.collections.find() // &lt;span class=&quot;error&quot;&gt;&amp;#91;a-z&amp;#93;&lt;/span&gt;+.test is still there -&amp;gt; BUG&lt;/p&gt;</description>
                <environment></environment>
        <key id="30505">SERVER-4954</key>
            <summary>Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs</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="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Mon, 13 Feb 2012 14:54:51 +0000</created>
                <updated>Mon, 11 Jul 2016 18:35:07 +0000</updated>
                            <resolved>Tue, 21 Feb 2012 18:12:52 +0000</resolved>
                                    <version>1.8.4</version>
                                    <fixVersion>2.1.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="89671" author="auto" created="Fri, 17 Feb 2012 23:08:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Ren&apos;, u&apos;email&apos;: u&apos;renctan@gmail.com&apos;}
&lt;p&gt;Message: Changes to address code review comments for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4954&quot; title=&quot;Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4954&quot;&gt;&lt;del&gt;SERVER-4954&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c70f2d58ab352997776556d25bb258eea09e1a4d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c70f2d58ab352997776556d25bb258eea09e1a4d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="89667" author="auto" created="Fri, 17 Feb 2012 23:08:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Ren&apos;, u&apos;email&apos;: u&apos;renctan@gmail.com&apos;}
&lt;p&gt;Message: fixed wrong test for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4954&quot; title=&quot;Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4954&quot;&gt;&lt;del&gt;SERVER-4954&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8b833b9a759b0b3c1f058908c38066e1d8f961fb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8b833b9a759b0b3c1f058908c38066e1d8f961fb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="89665" author="auto" created="Fri, 17 Feb 2012 23:08:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Ren&apos;, u&apos;email&apos;: u&apos;renctan@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4954&quot; title=&quot;Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4954&quot;&gt;&lt;del&gt;SERVER-4954&lt;/del&gt;&lt;/a&gt; 	Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs&lt;/p&gt;

&lt;p&gt;More detail explanation of cause:&lt;br/&gt;
When DBConfig::dropDatabase gets called, it will then call _dropShardedCollections. However, the collections that will get cleaned up is based from the _collections member variable, which is prepopulated with unescaped regex query at _load.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/359803779413dd3f17ef1f9f5910a03b1163f283&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/359803779413dd3f17ef1f9f5910a03b1163f283&lt;/a&gt;&lt;/p&gt;</comment>
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