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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-29273] Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator</title>
                <link>https://jira.mongodb.org/browse/SERVER-29273</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;With 2-phase drops, collections are not physically dropped (on all nodes) until the commit point advances past the optime when the collection drop was first requested on the primary. Since the ReplicationCoordinator maintains the commit point, it is a logical choice for a location to hold this list of drop-pending collections.&lt;/p&gt;

&lt;p&gt;This list is updated when:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;At server startup, we scan all non-local databases for collections with a drop-pending namespace (see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29251&quot; title=&quot;Two Phase Drops: add NamespaceString support for drop-pending collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29251&quot;&gt;&lt;del&gt;SERVER-29251&lt;/del&gt;&lt;/a&gt;).&lt;/li&gt;
	&lt;li&gt;When processing a collection drop command in a replicated setting, we add the drop-pending  namespace after renaming the collection and logging the drop request in the oplog.&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="384741">SERVER-29273</key>
            <summary>Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator</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="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 May 2017 15:10:18 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:41 +0000</updated>
                            <resolved>Wed, 24 May 2017 01:30:59 +0000</resolved>
                                                    <fixVersion>3.5.8</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1580261" author="xgen-internal-githook" created="Thu, 25 May 2017 19:17:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29273&quot; title=&quot;Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29273&quot;&gt;&lt;del&gt;SERVER-29273&lt;/del&gt;&lt;/a&gt; rename dropped collection to special drop-pending name&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit a339d8d6167aae163bdf7cda71c81e3165385ff4.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fe928cb39cf9c2434c894834a79b6cce94bc6197&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fe928cb39cf9c2434c894834a79b6cce94bc6197&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1580260" author="xgen-internal-githook" created="Thu, 25 May 2017 19:17:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29273&quot; title=&quot;Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29273&quot;&gt;&lt;del&gt;SERVER-29273&lt;/del&gt;&lt;/a&gt; rename dropped collection to special drop-pending name&lt;/p&gt;

&lt;p&gt;The drop-pending collection will be removed by DropPendingCollectionReaper&lt;br/&gt;
when the replica set commit level reaches the drop optime.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a339d8d6167aae163bdf7cda71c81e3165385ff4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a339d8d6167aae163bdf7cda71c81e3165385ff4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1578453" author="xgen-internal-githook" created="Wed, 24 May 2017 01:30:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29273&quot; title=&quot;Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29273&quot;&gt;&lt;del&gt;SERVER-29273&lt;/del&gt;&lt;/a&gt; add list of drop-pending namespaces at startup to DropPendingCollectionReaper&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1b88175df2275663919405e948489f111f2a9b7f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1b88175df2275663919405e948489f111f2a9b7f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1577916" author="xgen-internal-githook" created="Tue, 23 May 2017 16:59:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29273&quot; title=&quot;Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29273&quot;&gt;&lt;del&gt;SERVER-29273&lt;/del&gt;&lt;/a&gt; disable replicated writes when removing drop-pending collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3bb7318a5b5c8d4a07696ab1dd292fe5b9077924&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3bb7318a5b5c8d4a07696ab1dd292fe5b9077924&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1575661" author="xgen-internal-githook" created="Fri, 19 May 2017 18:14:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29273&quot; title=&quot;Two Phase Drops: add list of drop-pending collections to ReplicationCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29273&quot;&gt;&lt;del&gt;SERVER-29273&lt;/del&gt;&lt;/a&gt; add DropPendingCollectionReaper to manage drop-pending collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9ba2ced42110d439cf2644eaf57fac057dd1f337&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9ba2ced42110d439cf2644eaf57fac057dd1f337&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="384411">SERVER-29251</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="384745">SERVER-29274</issuekey>
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            <issuelink>
            <issuekey id="384758">SERVER-29275</issuekey>
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