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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-60922] Use `config.migrations` to persist the command recovery documents generated by BalancerCommandsScheduler.</title>
                <link>https://jira.mongodb.org/browse/SERVER-60922</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;BalancerCommandsScheduler&lt;/tt&gt; is currently storing in &lt;tt&gt;config.balancerCommandsSchedulerOngoingOperations&lt;/tt&gt; the information on commands to be re-issued after a step-down event  (similarly to what the &lt;tt&gt;MigrationManager&lt;/tt&gt; did with &lt;tt&gt;config.migrations&lt;/tt&gt;, but &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/s/balancer/balancer_command_document.idl#L40-L69&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;using a different schema&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;This may lead to some issues, such as:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;outstanding &lt;tt&gt;moveChunk&lt;/tt&gt; commands  stored in &lt;tt&gt;config.migrations&lt;/tt&gt; that won&apos;t be recovered after a server upgrade&lt;/li&gt;
	&lt;li&gt;outstanding &lt;tt&gt;moveChunk&lt;/tt&gt; commands  stored in &lt;tt&gt;config.balancerCommandsSchedulerOngoingOperations&lt;/tt&gt; that won&apos;t be recovered after a server downgrade&lt;/li&gt;
	&lt;li&gt;stale &lt;tt&gt;moveChunk&lt;/tt&gt; being wrongly re-issued after a downgrade+upgrade cycle.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;The simplest way to solve this problem is to avoid interactions with the FCV routine - and to just keep using `config.migrations` for the task.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1906349">SERVER-60922</key>
            <summary>Use `config.migrations` to persist the command recovery documents generated by BalancerCommandsScheduler.</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>Fri, 22 Oct 2021 08:44:30 +0000</created>
                <updated>Sun, 29 Oct 2023 21:47:03 +0000</updated>
                            <resolved>Tue, 7 Dec 2021 13:35:58 +0000</resolved>
                                    <version>Backlog</version>
                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4234242" author="xgen-internal-githook" created="Tue, 7 Dec 2021 12:23:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Paolo Polato&apos;, &apos;email&apos;: &apos;paolo.polato@mongodb.com&apos;, &apos;username&apos;: &apos;ppolato&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60922&quot; title=&quot;Use `config.migrations` to persist the command recovery documents generated by BalancerCommandsScheduler.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60922&quot;&gt;&lt;del&gt;SERVER-60922&lt;/del&gt;&lt;/a&gt; Use config.migrations to persist moveChunk recovery info&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d69f240a64dea20ca163a93b6eeb6494ea1e4a24&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d69f240a64dea20ca163a93b6eeb6494ea1e4a24&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1283037">SERVER-47003</issuekey>
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