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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-59966] Implement an initialisation routine in BalancerCommandsScheduler to support ConfigServer step down / crash events</title>
                <link>https://jira.mongodb.org/browse/SERVER-59966</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The collection chunks defragmentation algorithm info involves the submission of&#160;&lt;tt&gt;moveChunk&lt;/tt&gt; commands from the ConfigServer through &lt;tt&gt;BalancerCommandsScheduler&lt;/tt&gt;. &lt;/p&gt;

&lt;p&gt;The involved shards may require tens of seconds to complete such operation, during which an election of a new ConfigServer primary may occur: the new primary will have to resume the defragmentation algorithm from a stable state - meaning that no new commands may be issued as long as all the &lt;tt&gt;moveChunk&lt;/tt&gt; operations launched by its predecessor have completed.&lt;/p&gt;

&lt;p&gt;Such logic needs to be implemented within &lt;tt&gt;BalancerCommandsScheduler&lt;/tt&gt; relying on the persisted information about previously issued &lt;tt&gt;moveChunk&lt;/tt&gt; operations (see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59964&quot; title=&quot;The BalancerCommandsScheduler needs to persist on disk information on moveChunk commands under execution.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59964&quot;&gt;&lt;del&gt;SERVER-59964&lt;/del&gt;&lt;/a&gt; for details).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1875050">SERVER-59966</key>
            <summary>Implement an initialisation routine in BalancerCommandsScheduler to support ConfigServer step down / crash events</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="paolo.polato@mongodb.com">Paolo Polato</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                    </labels>
                <created>Wed, 15 Sep 2021 15:14:56 +0000</created>
                <updated>Sun, 29 Oct 2023 21:48:35 +0000</updated>
                            <resolved>Tue, 5 Oct 2021 13:07:04 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="4106380" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 17:23:31 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
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