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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-32899] Add background index builds and multikey index writes to rollback fuzzer</title>
                <link>https://jira.mongodb.org/browse/SERVER-32899</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;These are edge cases we&apos;ve discovered in our implementation, adding them to the fuzzer could expose bugs.&lt;/p&gt;</description>
                <environment></environment>
        <key id="487356">SERVER-32899</key>
            <summary>Add background index builds and multikey index writes to rollback fuzzer</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                            <label>rollback-optional</label>
                    </labels>
                <created>Thu, 25 Jan 2018 17:00:13 +0000</created>
                <updated>Tue, 6 Dec 2022 03:40:15 +0000</updated>
                            <resolved>Tue, 29 May 2018 20:46:19 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1903898" author="spencer" created="Tue, 29 May 2018 20:45:59 +0000"  >&lt;p&gt;We will get some coverage of multi-key writes within transactions being rolled back as part of the work on&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33863&quot; title=&quot;Add transactions and ddl operations on transactions table to rollback fuzzer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33863&quot;&gt;&lt;del&gt;SERVER-33863&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;This ticket would cover adding multi-key writes outside of transactions, and background index builds (which we wait to complete before starting rollback).&#160; But we think the value of testing those scenarios is relatively low.&lt;/p&gt;</comment>
                            <comment id="1785995" author="judah.schvimer" created="Fri, 26 Jan 2018 15:59:12 +0000"  >&lt;p&gt;Per conversation with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.guo&quot; class=&quot;user-hover&quot; rel=&quot;robert.guo&quot;&gt;robert.guo&lt;/a&gt;, the rollback fuzzer already does background index builds, but since there is only one client, those essentially are foregrounded on the primary. ( See &lt;a href=&quot;https://docs.mongodb.com/v3.6/core/index-creation/#behavior&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/v3.6/core/index-creation/#behavior&lt;/a&gt;). We should add the ability to run multiple clients, or at least one off parallel shells for background index builds, to the fuzzer. This could be used by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31799&quot; title=&quot;Run rollback fuzzer with upgrades&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31799&quot;&gt;&lt;del&gt;SERVER-31799&lt;/del&gt;&lt;/a&gt; to run setFCV commands at different points during rollback (since those will block on majority writes). &lt;/p&gt;</comment>
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