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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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    <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-53481] FSM threads race in secondary_reads_with_catalog_changes.js</title>
                <link>https://jira.mongodb.org/browse/SERVER-53481</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In this test, after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50610&quot; title=&quot;secondary_reads.js should not make assertions based on natural collection ordering&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50610&quot;&gt;&lt;del&gt;SERVER-50610&lt;/del&gt;&lt;/a&gt;, the logic is roughly:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;thread 0 always does inserts (with implicit createCollection) and create index on field x&lt;/li&gt;
	&lt;li&gt;All other threads do one of dropIndex, dropCollection, or scan index x (retry if index x not there because we assume thread 0 will create an index eventually)&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;However, if thread 0 completes before others, all other threads could hang if the index is dropped again after. &lt;/p&gt;

&lt;p&gt;I think maybe we could make the dropIndex thread to always recreate one after dropping the index so we don&apos;t rely on tid:0 being there to create the index. In other words, we probably should never have dependencies between threads in FSM because some of them might finish before others.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1576328">SERVER-53481</key>
            <summary>FSM threads race in secondary_reads_with_catalog_changes.js</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="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="lingzhi.deng@mongodb.com">Lingzhi Deng</reporter>
                        <labels>
                    </labels>
                <created>Tue, 22 Dec 2020 20:13:36 +0000</created>
                <updated>Sun, 29 Oct 2023 21:59:19 +0000</updated>
                            <resolved>Wed, 13 Jan 2021 15:42:55 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3561603" author="xgen-internal-githook" created="Wed, 13 Jan 2021 00:48:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Louis Williams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;username&apos;: &apos;louiswilliams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53481&quot; title=&quot;FSM threads race in secondary_reads_with_catalog_changes.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53481&quot;&gt;&lt;del&gt;SERVER-53481&lt;/del&gt;&lt;/a&gt; Fix race in secondary_reads_with_catalog_changes.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/34e32be7b869deea3fc100d4e60b08986fdc4528&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/34e32be7b869deea3fc100d4e60b08986fdc4528&lt;/a&gt;&lt;/p&gt;</comment>
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