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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-58720] DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata</title>
                <link>https://jira.mongodb.org/browse/SERVER-58720</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/58f0b2a63c61656314f1931158fe9d18488673e4/src/mongo/db/s/drop_database_coordinator.cpp#L292-L293&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;removal of a database entry from the config server&lt;/a&gt; marks the logical end a drop database operation but not the end of the coordinator lifetime.&lt;/p&gt;

&lt;p&gt;If a stepdown happens &lt;a href=&quot;https://github.com/mongodb/mongo/blob/58f0b2a63c61656314f1931158fe9d18488673e4/src/mongo/db/s/drop_database_coordinator.cpp#L295&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;before releasing the coordinator&lt;/a&gt;, on the next step-up it will be resumed and re-execute all the &lt;tt&gt;dropDatabase&lt;/tt&gt; logic even though - in the meantime - the database may have been recreated on a different primary shard.&lt;/p&gt;

&lt;p&gt;As a result, a &lt;tt&gt;dropDatabase&lt;/tt&gt; followed by a &lt;tt&gt;createCollection&lt;/tt&gt; (re-creating the db) may result in data loss.&lt;/p&gt;

&lt;p&gt;It can&apos;t be stated that the collection was recreated while &lt;tt&gt;dropDatabase&lt;/tt&gt; was still running, because the following interleaving can happen:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The user issues &lt;tt&gt;dropDatabase&lt;/tt&gt;&lt;/li&gt;
	&lt;li&gt;Stepdown happens &lt;a href=&quot;https://github.com/mongodb/mongo/blob/58f0b2a63c61656314f1931158fe9d18488673e4/src/mongo/db/s/drop_database_coordinator.cpp#L295&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;right after removing CSRS metadata&lt;/a&gt;]&lt;/li&gt;
	&lt;li&gt;The user receives an error&lt;/li&gt;
	&lt;li&gt;The user retries &lt;tt&gt;dropDatabase&lt;/tt&gt; that succeeds because the router &lt;a href=&quot;https://github.com/mongodb/mongo/blob/58f0b2a63c61656314f1931158fe9d18488673e4/src/mongo/s/commands/cluster_drop_database_cmd.cpp#L109-L111&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;doesn&apos;t find it on the CSRS&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;The user recreates a collection on the same database, with a different primary shard, and starts using it&lt;/li&gt;
	&lt;li&gt;Step-up happens, the coordinator is resumed and it removes legit data&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1827111">SERVER-58720</key>
            <summary>DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata</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="simon.gratzer@mongodb.com">Simon Gratzer</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Jul 2021 11:33:28 +0000</created>
                <updated>Sun, 29 Oct 2023 21:50:37 +0000</updated>
                            <resolved>Wed, 28 Jul 2021 16:15:14 +0000</resolved>
                                    <version>5.0.2</version>
                                    <fixVersion>5.0.3</fixVersion>
                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4107452" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:26:56 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3987771" author="xgen-internal-githook" created="Mon, 9 Aug 2021 09:38:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Simon Graetzer&apos;, &apos;email&apos;: &apos;simon.gratzer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58720&quot; title=&quot;DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58720&quot;&gt;&lt;del&gt;SERVER-58720&lt;/del&gt;&lt;/a&gt; DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/280882d07752ea5c2a1c3056a6e25078acf34dfb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/280882d07752ea5c2a1c3056a6e25078acf34dfb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3962951" author="xgen-internal-githook" created="Mon, 26 Jul 2021 15:16:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Simon Graetzer&apos;, &apos;email&apos;: &apos;simon.gratzer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58720&quot; title=&quot;DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58720&quot;&gt;&lt;del&gt;SERVER-58720&lt;/del&gt;&lt;/a&gt; DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/21298b120e831a2aa2c834cc29043f32f2ccc0d9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/21298b120e831a2aa2c834cc29043f32f2ccc0d9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3961282" author="xgen-internal-githook" created="Sat, 24 Jul 2021 09:04:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58720&quot; title=&quot;DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58720&quot;&gt;&lt;del&gt;SERVER-58720&lt;/del&gt;&lt;/a&gt; DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 306a69a50245fb0787391c26597b02c04a156488.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d4aa8951600a04d6b4233fa56e52dfd9e85eafbd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d4aa8951600a04d6b4233fa56e52dfd9e85eafbd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3959610" author="xgen-internal-githook" created="Fri, 23 Jul 2021 13:21:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Simon Graetzer&apos;, &apos;email&apos;: &apos;simon.gratzer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58720&quot; title=&quot;DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58720&quot;&gt;&lt;del&gt;SERVER-58720&lt;/del&gt;&lt;/a&gt; DropDatabaseCoordinator must not re-execute destructive logic after removing CSRS metadata&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/306a69a50245fb0787391c26597b02c04a156488&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/306a69a50245fb0787391c26597b02c04a156488&lt;/a&gt;&lt;/p&gt;</comment>
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