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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-62268] Handle balancer configuration refresh in `balancer_defragmentation_merge_chunks.js`</title>
                <link>https://jira.mongodb.org/browse/SERVER-62268</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When shards are refreshing the balancer configuration from the CSRS (&lt;a href=&quot;https://github.com/10gen/mongo/blob/d9fd9a16636ca741a00bab4b40748896753573d9/src/mongo/db/s/periodic_balancer_config_refresher.cpp#L69&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;every 30 seconds&lt;/a&gt;), some reads are performed on `config.settings` to retrieve the current state of the balancer.&lt;/p&gt;

&lt;p&gt;It is then possible that a shards temporarily has a non-updated status of the balancer for 30 seconds. For example, it can happen that a shard believes the auto splitter had been disabled because a refresh can see the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9766c982d67c2a8584e329f024d702d8e2c8138e/jstests/sharding/balancer_defragmentation_merge_chunks.js#L141&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stop&lt;/a&gt; of the balancer and not the subsequent &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9766c982d67c2a8584e329f024d702d8e2c8138e/jstests/sharding/balancer_defragmentation_merge_chunks.js#L155&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;start&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1956281">SERVER-62268</key>
            <summary>Handle balancer configuration refresh in `balancer_defragmentation_merge_chunks.js`</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="13201">Fixed</resolution>
                                        <assignee username="tommaso.tocci@mongodb.com">Tommaso Tocci</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Fri, 24 Dec 2021 11:28:42 +0000</created>
                <updated>Sun, 29 Oct 2023 21:44:41 +0000</updated>
                            <resolved>Mon, 10 Jan 2022 20:12:46 +0000</resolved>
                                                    <fixVersion>5.3.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4276341" author="xgen-internal-githook" created="Wed, 5 Jan 2022 15:42:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Tommaso Tocci&apos;, &apos;email&apos;: &apos;tommaso.tocci@mongodb.com&apos;, &apos;username&apos;: &apos;toto-dev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62268&quot; title=&quot;Handle balancer configuration refresh in `balancer_defragmentation_merge_chunks.js`&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62268&quot;&gt;&lt;del&gt;SERVER-62268&lt;/del&gt;&lt;/a&gt; Handle balancer configuration refresh in `balancer_defragmentation_merge_chunks.js`&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/619d0d3c24ca4b287098a343fb95c92e325c3d1b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/619d0d3c24ca4b287098a343fb95c92e325c3d1b&lt;/a&gt;&lt;/p&gt;</comment>
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