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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>[DOCS-14626] [SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert</title>
                <link>https://jira.mongodb.org/browse/DOCS-14626</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;ORIGINAL TITLE: Investigate changes in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58018&quot; title=&quot;Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58018&quot;&gt;&lt;del&gt;SERVER-58018&lt;/del&gt;&lt;/a&gt;: Creating a collection on standalone node that was part of a replica set may lead to fassert&lt;/p&gt;


    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    If the following sequence of events occurs:&lt;/p&gt;

&lt;p&gt;1. Node n in replica set is restarted as standalone&lt;br/&gt;
2. User creates a replicated collection on n&lt;br/&gt;
3. n rejoins the replica set&lt;/p&gt;

&lt;p&gt;In this case, the collection created on n in standalone mode would have a different UUID compared to the rest of the replica set. As a result, any subsequent operations on that collection would lead to an fassert.&lt;/p&gt;

&lt;p&gt;Should we update the docs around creating a replicated collection in standalone mode to inform users of this potential issue? This may help inform users about having collections with mismatched UUIDs. Thank you!&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    If the following sequence of events occurs:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;Node &lt;tt&gt;n&lt;/tt&gt; in replica set is restarted as standalone&lt;/li&gt;
	&lt;li&gt;User creates a replicated collection on &lt;tt&gt;n&lt;/tt&gt;&lt;/li&gt;
	&lt;li&gt;&lt;tt&gt;n&lt;/tt&gt; rejoins the replica set&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;In this case, the collection created on &lt;tt&gt;n&lt;/tt&gt; in standalone mode would have a different UUID compared to the rest of the replica set. As a result, any subsequent operations on that collection would lead to an &lt;tt&gt;fassert&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;To help alleviate this, one idea is require an explicit UUID when creating this new collection, if the node is currently in standalone mode but was previously part of a replica set. &lt;/p&gt;

&lt;p&gt;Alternatively, we can add warning logs when the node attempts to create replicated collections in standalone mode.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="1809616">DOCS-14626</key>
            <summary>[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert</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="dave.cuthbert@mongodb.com">Dave Cuthbert</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>manual</label>
                            <label>server</label>
                    </labels>
                <created>Tue, 6 Jul 2021 18:26:10 +0000</created>
                <updated>Sun, 29 Oct 2023 13:53:43 +0000</updated>
                            <resolved>Tue, 24 Jan 2023 17:36:28 +0000</resolved>
                                                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5136906" author="xgen-internal-githook" created="Tue, 24 Jan 2023 17:20:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dave Cuthbert&apos;, &apos;email&apos;: &apos;69165704+davemungo@users.noreply.github.com&apos;, &apos;username&apos;: &apos;davemungo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node (#2382) (#2437)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Review feedback&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/ba5edc35314830a9f3fd0d4aba32ba5c7dbb8c53&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/ba5edc35314830a9f3fd0d4aba32ba5c7dbb8c53&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="5136905" author="xgen-internal-githook" created="Tue, 24 Jan 2023 17:20:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dave Cuthbert&apos;, &apos;email&apos;: &apos;69165704+davemungo@users.noreply.github.com&apos;, &apos;username&apos;: &apos;davemungo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node (#2382) (#2436)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Review feedback&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/b390c3187e4fe11485aeda03e82e22f4e3c8e0e0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/b390c3187e4fe11485aeda03e82e22f4e3c8e0e0&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="5136902" author="xgen-internal-githook" created="Tue, 24 Jan 2023 17:20:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dave Cuthbert&apos;, &apos;email&apos;: &apos;69165704+davemungo@users.noreply.github.com&apos;, &apos;username&apos;: &apos;davemungo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node (#2382) (#2434)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Review feedback&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/f5912b933989eb5957174967efbe743d3b055899&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/f5912b933989eb5957174967efbe743d3b055899&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="5136901" author="xgen-internal-githook" created="Tue, 24 Jan 2023 17:20:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dave Cuthbert&apos;, &apos;email&apos;: &apos;69165704+davemungo@users.noreply.github.com&apos;, &apos;username&apos;: &apos;davemungo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node (#2382) (#2435)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Review feedback&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/40c3698891cce92e5b0b79cd74a7e3eb9a929692&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/40c3698891cce92e5b0b79cd74a7e3eb9a929692&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="5134603" author="xgen-internal-githook" created="Mon, 23 Jan 2023 21:41:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dave Cuthbert&apos;, &apos;email&apos;: &apos;69165704+davemungo@users.noreply.github.com&apos;, &apos;username&apos;: &apos;davemungo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node (#2382)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14626&quot; title=&quot;[SERVER] Creating a collection on standalone node that was part of a replica set may lead to fassert&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14626&quot;&gt;&lt;del&gt;DOCS-14626&lt;/del&gt;&lt;/a&gt; restore node&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Review feedback&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/7dd5781c1aae2b432bf905a87c2a2da39e0a6b9f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/7dd5781c1aae2b432bf905a87c2a2da39e0a6b9f&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
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