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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-63523] Drain ongoing sharded DDL operations before enabling write blocking on shards</title>
                <link>https://jira.mongodb.org/browse/SERVER-63523</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Sharded DDL operations are coordinated by the DB primary shard but may involve several participant shards. Participant shards need to perform local (shard) catalog changes. When enabling user write blocking (which would make participant shards unable of performing catalog changes), we must first ensure that there is no ongoing sharding DDL operation. Otherwise the ShardingDDLCoordinator would be unable to complete the operation, making the collection unavailable.&lt;/p&gt;

&lt;p&gt;One way to achieve this is to make user write blocking enablement a two step process on sharded clusters.&lt;br/&gt;
1st step: Tell all shards to prevent new ShardingDDLCoordinators from starting and drain any ongoing ones.&lt;br/&gt;
2ns step: Tell all shards to start blocking user writes/ddl.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1981042">SERVER-63523</key>
            <summary>Drain ongoing sharded DDL operations before enabling write blocking on shards</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</assignee>
                                    <reporter username="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Feb 2022 13:49:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:42:41 +0000</updated>
                            <resolved>Wed, 16 Mar 2022 09:03:51 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4414929" author="xgen-internal-githook" created="Wed, 16 Mar 2022 09:00:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63523&quot; title=&quot;Drain ongoing sharded DDL operations before enabling write blocking on shards&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63523&quot;&gt;&lt;del&gt;SERVER-63523&lt;/del&gt;&lt;/a&gt; Drain ongoing sharded DDL operations before enabling write blocking on shards&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ceca8a9f7fb4c89af6ce2cd84379f049c4d4c19e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ceca8a9f7fb4c89af6ce2cd84379f049c4d4c19e&lt;/a&gt;&lt;/p&gt;</comment>
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