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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-31386] Make drop collection take the distlock before attempting routing table refresh</title>
                <link>https://jira.mongodb.org/browse/SERVER-31386</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;queryoptimizer3.js does drop collection commands in parallel, which can conflict. See the linked BF for a full description. &lt;/p&gt;

&lt;p&gt;In summary, drop collection first refreshes it&apos;s routing metadata, then takes the distlock and proceeds to delete data and metadata under the protection of the distlock. The problem occurs when one drop collection command is running, has acquired the distlock, cleared shard data and cleared config.chunks entries, but not the config.collections entry. Then another drop collection command arrives and tries to refresh before getting blocked by the distlock. The refresh fails 10 times (ConflictingOperationInProgress), the command fails, and the test fails.&lt;/p&gt;

&lt;p&gt;Drop collection should take the distlock before calling getCollectionRoutingInfo, so that the command cannot conflict with itself, and prevent changes to the metadata it sees.&lt;/p&gt;</description>
                <environment></environment>
        <key id="440479">SERVER-31386</key>
            <summary>Make drop collection take the distlock before attempting routing table refresh</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="13203">Gone away</resolution>
                                        <assignee username="esha.maharishi@mongodb.com">Esha Maharishi</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Wed, 4 Oct 2017 18:29:32 +0000</created>
                <updated>Fri, 27 Oct 2023 20:43:51 +0000</updated>
                            <resolved>Fri, 13 Oct 2017 17:53:31 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1698542" author="esha.maharishi@10gen.com" created="Fri, 13 Oct 2017 17:53:31 +0000"  >&lt;p&gt;Acquiring the distlocks for dropCollection was moved to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ba0ee77c61c39b077d0975b7487099c5985c7b18/src/mongo/s/commands/cluster_drop_cmd.cpp#L91-L104&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;before reading from the CatalogCache&lt;/a&gt; in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30733&quot; title=&quot;Make DistLocks hierarchical for mongos commands&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30733&quot;&gt;&lt;del&gt;SERVER-30733&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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