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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26769] Balancer should load balancer settings before recovering migrations on failover</title>
                <link>https://jira.mongodb.org/browse/SERVER-26769</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On failover, the new config primary recovers migrations and uses the BalancerConfiguration class&apos; default maxChunkSize of 64 &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b8fc3fffe889ba9a34bb7193c1fec9139e4ad1c3/src/mongo/db/s/balancer/balancer.cpp#L330-L338&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; without trying to load any maxChunkSize user setting from config.settings. Thus, a chunk larger than what the user has defined as jumbo may get moved.&lt;/p&gt;

&lt;p&gt;If the new primary was primary previously, it may have the correct maxChunkSize value set in the BalancerConfiguration instance: though it would be stale, whether right or wrong.&lt;/p&gt;

&lt;p&gt;BalancerConfiguration::refreshAndCheck should be called before balancer recovery, as it is done before running every auto balancing round.&lt;/p&gt;</description>
                <environment></environment>
        <key id="326758">SERVER-26769</key>
            <summary>Balancer should load balancer settings before recovering migrations on failover</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>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Oct 2016 19:09:47 +0000</created>
                <updated>Tue, 8 Nov 2016 22:29:03 +0000</updated>
                            <resolved>Wed, 26 Oct 2016 19:35:08 +0000</resolved>
                                                    <fixVersion>3.4.0-rc2</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1418698" author="xgen-internal-githook" created="Wed, 26 Oct 2016 19:33:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;DiannaHohensee&apos;, u&apos;name&apos;: u&apos;Dianna Hohensee&apos;, u&apos;email&apos;: u&apos;dianna.hohensee@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26769&quot; title=&quot;Balancer should load balancer settings before recovering migrations on failover&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26769&quot;&gt;&lt;del&gt;SERVER-26769&lt;/del&gt;&lt;/a&gt; Balancer loads balancer settings before recovery and accepting/starting new migrations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d187c9ee45046a32c2fde033550f4ddbc6229794&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d187c9ee45046a32c2fde033550f4ddbc6229794&lt;/a&gt;&lt;/p&gt;</comment>
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