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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-79937] Avoid majority reads within the BalancerDefragmentationPolicy</title>
                <link>https://jira.mongodb.org/browse/SERVER-79937</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;BalancerDefragmentationPolicy&lt;/tt&gt; is a collaborator of the &lt;tt&gt;Balancer&lt;/tt&gt; accessed by its secondary thread and an executor - and its state is hence protected by a mutex.&lt;/p&gt;

&lt;p&gt;In order to avoid deadlocks in stepdown scenarios, &lt;tt&gt;BalancerDefragmentationPolicy&lt;/tt&gt; should avoid majority waits while holding its mutex.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2415598">SERVER-79937</key>
            <summary>Avoid majority reads within the BalancerDefragmentationPolicy</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="paolo.polato@mongodb.com">Paolo Polato</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                    </labels>
                <created>Fri, 11 Aug 2023 15:00:58 +0000</created>
                <updated>Sun, 29 Oct 2023 21:17:41 +0000</updated>
                            <resolved>Wed, 16 Aug 2023 07:53:51 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5783829" author="xgen-internal-githook" created="Tue, 17 Oct 2023 09:41:22 +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: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79937&quot; title=&quot;Avoid majority reads within the BalancerDefragmentationPolicy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79937&quot;&gt;&lt;del&gt;SERVER-79937&lt;/del&gt;&lt;/a&gt; Avoid waiting for replication while defragmenting a collection&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit b9400522faf69f239a91feb6c0f6f777d42327b4.&lt;br/&gt;
Branch: v7.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f387ede4967008f18f98802b9509c3ece26c5441&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f387ede4967008f18f98802b9509c3ece26c5441&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5733748" author="xgen-internal-githook" created="Wed, 27 Sep 2023 08:37:35 +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: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79937&quot; title=&quot;Avoid majority reads within the BalancerDefragmentationPolicy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79937&quot;&gt;&lt;del&gt;SERVER-79937&lt;/del&gt;&lt;/a&gt; Avoid waiting for replication while defragmenting a collection&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 82f57718ce8ea1241beb5a01aaef90b2ac95d1c0.&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f2c5ca4eb62cee34a563d383affbf85e26426682&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f2c5ca4eb62cee34a563d383affbf85e26426682&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5731447" author="xgen-internal-githook" created="Tue, 26 Sep 2023 14:22:56 +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: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79937&quot; title=&quot;Avoid majority reads within the BalancerDefragmentationPolicy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79937&quot;&gt;&lt;del&gt;SERVER-79937&lt;/del&gt;&lt;/a&gt; Avoid waiting for replication while defragmenting a collection&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit b9400522faf69f239a91feb6c0f6f777d42327b4.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fd1acfa9d6a1b282bb502fe0fb24d8886e8fe171&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fd1acfa9d6a1b282bb502fe0fb24d8886e8fe171&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5646978" author="xgen-internal-githook" created="Mon, 21 Aug 2023 14:55:26 +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-79937&quot; title=&quot;Avoid majority reads within the BalancerDefragmentationPolicy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79937&quot;&gt;&lt;del&gt;SERVER-79937&lt;/del&gt;&lt;/a&gt; Avoid waiting for replication while defragmenting a collection&lt;/p&gt;

&lt;p&gt;(cherry picked from commit b9400522faf69f239a91feb6c0f6f777d42327b4)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/82f57718ce8ea1241beb5a01aaef90b2ac95d1c0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/82f57718ce8ea1241beb5a01aaef90b2ac95d1c0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5636730" author="xgen-internal-githook" created="Wed, 16 Aug 2023 07:35:49 +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-79937&quot; title=&quot;Avoid majority reads within the BalancerDefragmentationPolicy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79937&quot;&gt;&lt;del&gt;SERVER-79937&lt;/del&gt;&lt;/a&gt; Avoid waiting for replication while defragmenting a collection&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b9400522faf69f239a91feb6c0f6f777d42327b4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b9400522faf69f239a91feb6c0f6f777d42327b4&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2449202">SERVER-81372</issuekey>
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