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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-7024] One balance round can move multiple chunks, even if the balancer is disabled midway through</title>
                <link>https://jira.mongodb.org/browse/SERVER-7024</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a balance round starts, we find every collection that needs balancing and choose one chunk for each collection to move.  The balancer then moves all those chunks (one at a time) as a part of the same balance round.&lt;/p&gt;

&lt;p&gt;Before every balance round we check to make sure the balancer is disabled and don&apos;t kick off a migration if it is.  Within one balance round, however, we don&apos;t ever check if the balancer has been disabled, and since one balance round can include moving multiple chunks, so long as those chunks are from different collections, that means that even if the balancer gets disabled, new chunk moves can continue to be initiated if the current balance round is still in progress.&lt;/p&gt;

&lt;p&gt;We should add a check between each migration in the balance round to see if the balancer has been disabled since the balancing round began.&lt;/p&gt;</description>
                <environment></environment>
        <key id="50368">SERVER-7024</key>
            <summary>One balance round can move multiple chunks, even if the balancer is disabled midway through</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>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                            <label>neweng</label>
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                <created>Wed, 12 Sep 2012 20:03:22 +0000</created>
                <updated>Sat, 8 Mar 2014 18:09:47 +0000</updated>
                            <resolved>Fri, 7 Mar 2014 17:00:38 +0000</resolved>
                                    <version>2.0.7</version>
                    <version>2.2.0</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
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