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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-54171] Make `enableSharding` optimistically try to set the `sharded` bit</title>
                <link>https://jira.mongodb.org/browse/SERVER-54171</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;enableSharding&lt;/tt&gt; operation has a two-fold purpose: If the database doesn&apos;t exist, it creates it and also sets the &lt;tt&gt;sharded&lt;/tt&gt; bit, but if the database already exists, it just sets the &lt;tt&gt;sharded&lt;/tt&gt; bit. The current implementation takes the expensive &lt;tt&gt;createDatabase&lt;/tt&gt; path in both cases, which in turn takes the distributed lock from the config server. However, this is problematic for the step-down suites, because it means retry of &lt;tt&gt;enableSharding&lt;/tt&gt; can fail with a LockBusy error, because the lock is held by the shard.&lt;/p&gt;

&lt;p&gt;This ticket is to make &lt;tt&gt;enableSharding&lt;/tt&gt; to optimistically try to set the &lt;tt&gt;sharded&lt;/tt&gt; bit first, before taking the expensive &lt;tt&gt;createDatabase&lt;/tt&gt; path.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1607320">SERVER-54171</key>
            <summary>Make `enableSharding` optimistically try to set the `sharded` bit</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>PM-1965-Milestone-1</label>
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                <created>Mon, 1 Feb 2021 15:48:35 +0000</created>
                <updated>Sun, 29 Oct 2023 21:58:10 +0000</updated>
                            <resolved>Tue, 2 Feb 2021 12:38:51 +0000</resolved>
                                    <version>4.9.0-alpha4</version>
                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3594355" author="xgen-internal-githook" created="Tue, 2 Feb 2021 12:09:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54171&quot; title=&quot;Make `enableSharding` optimistically try to set the `sharded` bit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54171&quot;&gt;&lt;del&gt;SERVER-54171&lt;/del&gt;&lt;/a&gt; Make `enableSharding` optimistically skip acquiring the DB DistLock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d19b65732b32761da0587dc9784366155f559e1c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d19b65732b32761da0587dc9784366155f559e1c&lt;/a&gt;&lt;/p&gt;</comment>
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