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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-54363] Tests using ShardServerTestFixture can seg fault if there are outstanding tasks in the CatalogCache</title>
                <link>https://jira.mongodb.org/browse/SERVER-54363</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The CatalogCache takes in a loader as a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9e311535fcd41f2c56b8dc19cf1a7953212e53ab/src/mongo/s/catalog_cache.cpp#L92&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;reference&lt;/a&gt;. When the fixture calls tearDown, it &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9e311535fcd41f2c56b8dc19cf1a7953212e53ab/src/mongo/db/s/shard_server_test_fixture.cpp#L87&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;clears the loader&lt;/a&gt;. That means that if the CatalogCache still has pending refresh tasks, it can end up trying to use the loader after it was freed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1614407">SERVER-54363</key>
            <summary>Tests using ShardServerTestFixture can seg fault if there are outstanding tasks in the CatalogCache</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="13201">Fixed</resolution>
                                        <assignee username="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 5 Feb 2021 19:23:37 +0000</created>
                <updated>Sun, 29 Oct 2023 21:57:50 +0000</updated>
                            <resolved>Mon, 8 Mar 2021 10:48:05 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3651520" author="xgen-internal-githook" created="Mon, 8 Mar 2021 10:35:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jos&#233; Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54363&quot; title=&quot;Tests using ShardServerTestFixture can seg fault if there are outstanding tasks in the CatalogCache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54363&quot;&gt;&lt;del&gt;SERVER-54363&lt;/del&gt;&lt;/a&gt; Clear the grid before tearing down resharding unittest&lt;br/&gt;
...so the catalog cache is freed before the catalog cache loader&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3db7832536175fb56b9149203d485746873f912e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3db7832536175fb56b9149203d485746873f912e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3647652" author="marcos.grillo" created="Thu, 4 Mar 2021 20:09:26 +0000"  >&lt;p&gt;The catalog cache is using it&apos;s own &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9e92a6d17ee8ef60c384abc0eb5a49d030f633cf/src/mongo/s/catalog_cache.cpp#L96&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;threadpool&lt;/a&gt; so, by the time the CatalogCache object is destroyed (on the ShardingMongodFixture) and the outstanding operations joined, the CatalogCacheLoader is already freed. I will discuss with the team about adding a function that will allow joining and shutting down that threadpool for tests (something like the catalog cache loader already has) that can be called BEFORE freeing the loader.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="1572455">SERVER-53452</issuekey>
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