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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-26667] Legacy SCCC dist lock race during first lock acquisition</title>
                <link>https://jira.mongodb.org/browse/SERVER-26667</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Here&apos;s the hypothetical scenario:&lt;/p&gt;

&lt;p&gt;1. Thread 1 sees that the lock document does not exist and tries to create it.&lt;/p&gt;

&lt;p&gt;C1: unlocked, owned by nobody&lt;br/&gt;
C2: -&lt;br/&gt;
C3: -&lt;/p&gt;

&lt;p&gt;2. Thread 2 comes in and sees on the first config the the lock is in unlocked state and tries to grab it by sending updates to 3 config servers.&lt;/p&gt;

&lt;p&gt;3. However, since the update is upsert: false, it will only succeed in updating the first one.&lt;/p&gt;

&lt;p&gt;C1: locked, owned by thread 2&lt;br/&gt;
C2: -&lt;br/&gt;
C3: -&lt;/p&gt;

&lt;p&gt;4. Since thread 2 failed to update to all 3 config servers, it will enter the tournament round which will then fail immediately because the lock document does not exist on the other config servers.&lt;/p&gt;</description>
                <environment></environment>
        <key id="324319">SERVER-26667</key>
            <summary>Legacy SCCC dist lock race during first lock acquisition</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Mon, 17 Oct 2016 20:46:37 +0000</created>
                <updated>Tue, 6 Dec 2022 04:13:53 +0000</updated>
                            <resolved>Thu, 29 Dec 2016 15:22:17 +0000</resolved>
                                    <version>3.2.10</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1466482" author="kaloian.manassiev" created="Thu, 29 Dec 2016 15:22:17 +0000"  >&lt;p&gt;With SCCC deprecated and since this is not a correctness problem, but just a rare nuisance at mongos startup, we won&apos;t fix this bug.&lt;/p&gt;</comment>
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