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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-43144] _configsvrDropCollection should handle user dropping config.system.sessions if config.system.sessions is not in sharding catalog</title>
                <link>https://jira.mongodb.org/browse/SERVER-43144</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If the config.system.sessions collection is not in the sharding catalog, it&apos;s unclear whether the drop should be applied to all shards or just the config shard, because either of these could have occurred previously:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;a previous drop attempt failed partway, and setShardVersion did not get sent to all shards&lt;/li&gt;
	&lt;li&gt;a previous drop attempt succeeded, and the user created their own config.system.sessions collection, which would have been created on the config shard&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I encountered this while working on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42842&quot; title=&quot;Unable to drop collection in admin database of sharded cluster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42842&quot;&gt;&lt;del&gt;SERVER-42842&lt;/del&gt;&lt;/a&gt;. Dropping config.system.sessions is not really supported, and the behavior before &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33973&quot; title=&quot;Force cleanup of possibly remaining partial data (from failed collection/database drop) when rerunning dropCollection command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33973&quot;&gt;&lt;del&gt;SERVER-33973&lt;/del&gt;&lt;/a&gt; was to run the drop only against the config shard, so that is the behavior I am preserving under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42842&quot; title=&quot;Unable to drop collection in admin database of sharded cluster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42842&quot;&gt;&lt;del&gt;SERVER-42842&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="915483">SERVER-43144</key>
            <summary>_configsvrDropCollection should handle user dropping config.system.sessions if config.system.sessions is not in sharding catalog</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="13202">Works as Designed</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Tue, 3 Sep 2019 18:26:05 +0000</created>
                <updated>Fri, 27 Oct 2023 13:53:05 +0000</updated>
                            <resolved>Mon, 16 Sep 2019 14:55:55 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2421672" author="esha.maharishi@10gen.com" created="Mon, 16 Sep 2019 16:27:34 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42842&quot; title=&quot;Unable to drop collection in admin database of sharded cluster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42842&quot;&gt;&lt;del&gt;SERVER-42842&lt;/del&gt;&lt;/a&gt; made &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2028897e65401497c58d97a16da68f2e404bbee7/src/mongo/db/s/config/configsvr_drop_collection_command.cpp#L164&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;dropping config.system.sessions always broadcast to shards&lt;/a&gt;, even if there is no entry for config.system.sessions in the sharding catalog.&lt;/p&gt;</comment>
                            <comment id="2421465" author="jason.carey" created="Mon, 16 Sep 2019 14:55:55 +0000"  >&lt;p&gt;We&apos;ve made dropping config.system.sessions work in sharded and unsharded cases elsewhere, removing the need for this ticket&lt;/p&gt;</comment>
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