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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-29275] Two Phase Drops: implement collection drop commit logic</title>
                <link>https://jira.mongodb.org/browse/SERVER-29275</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Background: collections are no longer dropped immediately but renamed to a special drop-pending name and added to a task list in the ReplicationCoordinator.&lt;/p&gt;

&lt;p&gt;When the node sees the commit level (as dictated by the writeConcernMajorityJournalDefault) reach the drop op, it drops the drop-pending collection and removes the task from the list.  Note that the proposed initial trigger for phase 2 (the drop op itself becomes known to be present on a majority of nodes) may not remain so in future versions; it may need to be delayed until a different condition.&lt;/p&gt;</description>
                <environment></environment>
        <key id="384758">SERVER-29275</key>
            <summary>Two Phase Drops: implement collection drop commit logic</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 15:24:13 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:41 +0000</updated>
                            <resolved>Thu, 25 May 2017 14:00:15 +0000</resolved>
                                                    <fixVersion>3.5.8</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1989669" author="lanutellaclavie" created="Thu, 30 Aug 2018 10:34:49 +0000"  >&lt;p&gt;Hi guys,&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Is there an option to disable this behavior in 3.6 ?&lt;/p&gt;

&lt;p&gt;It has a deadly side effect on our 3 members replica set cluster (1 arbiter and 2 nodes) : if we lose our secondary node, our file system will keep on growing up, as we drop and recreate new versions of collections regularly.&lt;/p&gt;

&lt;p&gt;Even though the total amount of data to store remains fairly stable, at some point we&apos;ll face a shortage of disk space.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Obviously, restarting our secondary node is very soon no longer an option : sync will not happen, as the node will get stalled pretty quickly.&lt;/p&gt;

&lt;p&gt;So we just can&apos;t run with a dead secondary node : eventually primary will die too, whereas in 3.4 it could have lived happily ever after ...&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Thanks a lot&lt;/p&gt;</comment>
                            <comment id="1579575" author="xgen-internal-githook" created="Wed, 24 May 2017 23:18:13 +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-29275&quot; title=&quot;Two Phase Drops: implement collection drop commit logic&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29275&quot;&gt;&lt;del&gt;SERVER-29275&lt;/del&gt;&lt;/a&gt; ReplicationCoordinator cleans up drop-pending collection when commit level advances&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f4cd5a8511fbda4ac06e70ba69eb90ad1d1beb39&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f4cd5a8511fbda4ac06e70ba69eb90ad1d1beb39&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1579514" author="xgen-internal-githook" created="Wed, 24 May 2017 22:05:33 +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-29275&quot; title=&quot;Two Phase Drops: implement collection drop commit logic&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29275&quot;&gt;&lt;del&gt;SERVER-29275&lt;/del&gt;&lt;/a&gt; ReplicationCoordinatorExternalStateImpl accepts DropPendingCollectionReaper as constructor argument&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a9023ef65e67ca90018f94b57bb84aaff7484917&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a9023ef65e67ca90018f94b57bb84aaff7484917&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1575329" author="xgen-internal-githook" created="Fri, 19 May 2017 13:43:50 +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-29275&quot; title=&quot;Two Phase Drops: implement collection drop commit logic&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29275&quot;&gt;&lt;del&gt;SERVER-29275&lt;/del&gt;&lt;/a&gt; ReplicationCoordinatorExternalState::notifyOplogMetadataWaiters() accepts last committed optime&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2c2fcdffb42e95440b166c93733e120b033c0e12&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2c2fcdffb42e95440b166c93733e120b033c0e12&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="384741">SERVER-29273</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="384745">SERVER-29274</issuekey>
        </issuelink>
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            <issuekey id="384763">SERVER-29277</issuekey>
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            <issuekey id="231327">SERVER-20604</issuekey>
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