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    <title>MongoDB Jira</title>
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    <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-71444] [Sharding] Remove or document instances of UninterruptibleLockGuard</title>
                <link>https://jira.mongodb.org/browse/SERVER-71444</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68868&quot; title=&quot;Remove all instances of UninterruptibleLockGuard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68868&quot;&gt;SERVER-68868&lt;/a&gt; intends to remove UninterruptipleLockGuard uses where possible, from its description:&lt;/p&gt;
&lt;div class=&quot;panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelContent&quot;&gt;
&lt;p&gt;Uses of UninterruptibleLockGuard indicate places in the code that do not comply with MongoDB&apos;s requirement that all operations be interruptible at places where they block to wait for resources. Every one of them is a potential future deadlock, and adds complexity to other parts of the codebase. We should reimplement codepaths that depend on UninterruptibleLockGuard so as to be interruptible.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;The work has been split for the different teams in server, this one being for Sharding.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68867&quot; title=&quot;Use linter to prevent new instances of UninteruptibleLockGuard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68867&quot;&gt;&lt;del&gt;SERVER-68867&lt;/del&gt;&lt;/a&gt; introduced a linter rule to add friction when adding new UninterruptipleLockGuard instances, and commented existing ones with NOLINT, while also adding a TODO with the corresponding server team ticket if an instance was found to not have a comment explaining why its use is warranted.&lt;/p&gt;

&lt;p&gt;We should either add a comment justifying the use of UninterruptibleLockGuard or fix the code to remove its use.&lt;br/&gt;
You may search for &quot;TODO (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71444&quot; title=&quot;[Sharding] Remove or document instances of UninterruptibleLockGuard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71444&quot;&gt;SERVER-71444&lt;/a&gt;)&quot;, as of this writing there are 26 instances:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/34ac49477b87e183637f68cda828ecff8b393c64/src/mongo/db/s/collection_sharding_runtime.cpp#L581&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/34ac49477b87e183637f68cda828ecff8b393c64/src/mongo/db/s/collection_sharding_runtime.cpp#L581&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo/blob/34ac49477b87e183637f68cda828ecff8b393c64/src/mongo/db/s/create_collection_coordinator.cpp#L1295&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/34ac49477b87e183637f68cda828ecff8b393c64/src/mongo/db/s/create_collection_coordinator.cpp#L1295&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo/blob/34ac49477b87e183637f68cda828ecff8b393c64/src/mongo/db/s/drop_database_coordinator.cpp#L167&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/34ac49477b87e183637f68cda828ecff8b393c64/src/mongo/db/s/drop_database_coordinator.cpp#L167&lt;/a&gt;&lt;br/&gt;
...&lt;/p&gt;</description>
                <environment></environment>
        <key id="2188579">SERVER-71444</key>
            <summary>[Sharding] Remove or document instances of UninterruptibleLockGuard</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="yujin.kang@mongodb.com">Yujin Kang Park</reporter>
                        <labels>
                            <label>12/12</label>
                    </labels>
                <created>Thu, 17 Nov 2022 11:41:56 +0000</created>
                <updated>Tue, 12 Dec 2023 14:38:39 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>4</watches>
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