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    <description>This file is an XML representation of an issue</description>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-56226] [v4.4] Introduce &apos;permitMigrations&apos; field on config.collections entry to prevent chunk migrations from committing</title>
                <link>https://jira.mongodb.org/browse/SERVER-56226</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This ticket represents reimplementing &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50027&quot; title=&quot;Freeze migrations on original sharded collection while the resharding operation is in progress&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50027&quot;&gt;&lt;del&gt;SERVER-50027&lt;/del&gt;&lt;/a&gt; on older branches due to the refactor of IDL-ifying the config.collections entry format not being suitable for cherry&amp;#45;pick backport.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1685605">SERVER-56226</key>
            <summary>[v4.4] Introduce &apos;permitMigrations&apos; field on config.collections entry to prevent chunk migrations from committing</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Apr 2021 13:20:14 +0000</created>
                <updated>Sun, 29 Oct 2023 21:54:43 +0000</updated>
                            <resolved>Mon, 25 Oct 2021 15:24:04 +0000</resolved>
                                                    <fixVersion>4.4.11</fixVersion>
                    <fixVersion>4.2.18</fixVersion>
                                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4151246" author="xgen-internal-githook" created="Wed, 27 Oct 2021 12:56:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jos&#233; Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56226&quot; title=&quot;[v4.4] Introduce &amp;#39;permitMigrations&amp;#39; field on config.collections entry to prevent chunk migrations from committing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56226&quot;&gt;&lt;del&gt;SERVER-56226&lt;/del&gt;&lt;/a&gt; Implement a &apos;permitMigrations&apos; collection property to prevent chunk migration&apos;s commits and balancing rounds&lt;br/&gt;
Branch: BACKPORT-9836&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53bf3779928dccbb0abf1e302cf80096b8a63f4a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53bf3779928dccbb0abf1e302cf80096b8a63f4a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4149180" author="xgen-internal-githook" created="Tue, 26 Oct 2021 18:18:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jos&#233; Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56226&quot; title=&quot;[v4.4] Introduce &amp;#39;permitMigrations&amp;#39; field on config.collections entry to prevent chunk migrations from committing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56226&quot;&gt;&lt;del&gt;SERVER-56226&lt;/del&gt;&lt;/a&gt; Implement a &apos;permitMigrations&apos; collection property to prevent chunk migration&apos;s commits and balancing rounds&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 53bf3779928dccbb0abf1e302cf80096b8a63f4a)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/512107f95fb8f41c8f2d66a8514a6bc910156c20&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/512107f95fb8f41c8f2d66a8514a6bc910156c20&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4145540" author="xgen-internal-githook" created="Mon, 25 Oct 2021 15:14:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jos&#233; Grillo Ramirez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56226&quot; title=&quot;[v4.4] Introduce &amp;#39;permitMigrations&amp;#39; field on config.collections entry to prevent chunk migrations from committing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56226&quot;&gt;&lt;del&gt;SERVER-56226&lt;/del&gt;&lt;/a&gt; Implement a &apos;permitMigrations&apos; collection property to prevent chunk migration&apos;s commits and balancing rounds&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53bf3779928dccbb0abf1e302cf80096b8a63f4a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53bf3779928dccbb0abf1e302cf80096b8a63f4a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4113349" author="marcos.grillo" created="Fri, 8 Oct 2021 16:44:20 +0000"  >&lt;p&gt;After a conversation with the team, in order to ensure a seamless upgrade between 4.4 and 5.0, and considering the surface area of the allowMigration flag changes (it&apos;s not just the original ticket, but the subsequent fixes to some scenarios that were not considered originally), we&apos;ll change the approach of this ticket. We&apos;ll be adding a new flag that will not be propagated on the catalog cache throughout the cluster, but will remain local to the config server, preventing new migrations to start, and preventing ongoing migrations to commit, and for 6.0 we&apos;ll merge the flag with allowMigrations, which additionally prevents migrations from starting on shards.&lt;/p&gt;</comment>
                            <comment id="4031036" author="marcos.grillo" created="Tue, 31 Aug 2021 12:00:44 +0000"  >&lt;p&gt;I&apos;ve evaluated the changes necessary to complete this ticket, I&apos;ll start implementing it once I&apos;ve finished other tasks on my backlog.&lt;/p&gt;</comment>
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