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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-31370] Add failpoints to rs_rollback.cpp to allow testing of concurrent ops on sync source</title>
                <link>https://jira.mongodb.org/browse/SERVER-31370</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We should add failpoints to &lt;tt&gt;rs_rollback.cpp&lt;/tt&gt; that can allow us to more deterministically test rollbacks scenarios where operations are happening on the sync source node during rollback. There are two failpoints that should provide a good level of control.&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;Provide ability to hang at specified doc refetch progress. This failpoint can take as an argument a percentage (between 0 and 1), that will determine when in the document refetching process rollback will hang. For example, specifying a hang point of 0.5, and with 100 documents to refetch, rollback would hang after the 50th refetch, allowing us to apply operations on the sync source while rollback is paused.&lt;/li&gt;
	&lt;li&gt;Provide ability to hang before re-syncing collection metadata. This will provide ability to apply more operations to the sync source after we have already updated minValid once, and after we have refetched docs.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;These two fail points should provide a suitable level of control, and help to make tests more reproducible.&lt;/p&gt;</description>
                <environment></environment>
        <key id="439610">SERVER-31370</key>
            <summary>Add failpoints to rs_rollback.cpp to allow testing of concurrent ops on sync source</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                    </labels>
                <created>Tue, 3 Oct 2017 19:18:50 +0000</created>
                <updated>Fri, 27 Oct 2023 20:43:52 +0000</updated>
                            <resolved>Tue, 29 May 2018 20:39:23 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1903886" author="spencer" created="Tue, 29 May 2018 20:39:23 +0000"  >&lt;p&gt;This isn&apos;t a concern for rollback via WT checkpoint, only for rollback via refetch which is going away.&lt;/p&gt;</comment>
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