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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-56880] Make sure random_DDL_CRUD_operations.js releases the jstest collection mutex on failure</title>
                <link>https://jira.mongodb.org/browse/SERVER-56880</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The random_DDL_CRUD_operations.js FSM &lt;a href=&quot;https://github.com/mongodb/mongo/blob/02d6940401bd6ff2696decc90dd01398f0bd6065/jstests/concurrency/fsm_workloads/random_DDL_CRUD_operations.js#L53-L67&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;takes a mutex&lt;/a&gt; to serialize drop and CRUD states on the same collection.&lt;br/&gt;
If a command fails while the mutex is held, that thread will throw and never unlock the mutex. This will cause the other FSM threads to potentially wait infinitely trying to take the mutex, and eventually the test fails because of timeout.  This is not desirable because:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The test will take a long time until it timesout. It would be better if it fails more promptly&lt;/li&gt;
	&lt;li&gt;It is more difficult to triage the failure, since all of them manifest as test-timeout acquiring that mutex.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Instead, we could use a try-catch-finally block to make sure that the mutex gets unlocked even if the command fails. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/02d6940401bd6ff2696decc90dd01398f0bd6065/jstests/concurrency/fsm_workloads/random_DDL_CRUD_operations.js#L99-L101&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Here for the drop state&lt;/a&gt;, and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/02d6940401bd6ff2696decc90dd01398f0bd6065/jstests/concurrency/fsm_workloads/random_DDL_CRUD_operations.js#L175-L212&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here for the CRUD state&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1711871">SERVER-56880</key>
            <summary>Make sure random_DDL_CRUD_operations.js releases the jstest collection mutex on failure</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="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</assignee>
                                    <reporter username="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</reporter>
                        <labels>
                            <label>PM-1965-Cleanup</label>
                    </labels>
                <created>Wed, 12 May 2021 08:23:15 +0000</created>
                <updated>Sun, 29 Oct 2023 21:53:41 +0000</updated>
                            <resolved>Wed, 12 May 2021 16:15:16 +0000</resolved>
                                                    <fixVersion>5.0.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3769370" author="xgen-internal-githook" created="Wed, 12 May 2021 15:38:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56880&quot; title=&quot;Make sure random_DDL_CRUD_operations.js releases the jstest collection mutex on failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56880&quot;&gt;&lt;del&gt;SERVER-56880&lt;/del&gt;&lt;/a&gt; Make sure random_DDL_CRUD_operations.js releases the jstest collection mutex on failure&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/834141425095afacc54c01234602468a353980ff&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/834141425095afacc54c01234602468a353980ff&lt;/a&gt;&lt;/p&gt;</comment>
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