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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>
    </build-info>


<item>
            <title>[DOCS-12513] Docs for SERVER-39418: Ban atClusterTime with enableMajorityReadConcern:false</title>
                <link>https://jira.mongodb.org/browse/DOCS-12513</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;blockquote&gt;
&lt;h3&gt;&lt;a name=&quot;Description%3A&quot;&gt;&lt;/a&gt;Description: &lt;/h3&gt;

&lt;p&gt;We will no longer support &apos;atClusterTime&apos; with enableMajorityReadConcern:false. The external-facing implication of this is that:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;in 4.2 with enableMajorityReadConcern:false, we will not support transactions in sharded clusters with readConcern level &apos;snapshot&apos;. &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;  Done as part of earlier ticket. but need to update error message&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;(Note that 4.0 does not support transactions in sharded clusters at all, and 4.2 with enableMajorityReadConcern:false only supports single-shard transactions.) &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt; Done as part of earlier ticket.&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;4.0 users should be cautioned that if they are using enableMajorityReadConcern:false and single replica set transactions, then they may wish to avoid readConcern level &apos;snapshot&apos; if they may transition to using a sharded cluster in 4.2, since this will break their application.&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;In 4.2 with enableMajorityReadConcern:false, single-shard transactions will support readConcern levels &apos;local&apos; and &apos;majority&apos;. &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;h3&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h3&gt;

&lt;p&gt;This means that single-shard transactions on enableMajorityReadConcern:false shards cannot be run with readConcern level snapshot.&lt;/p&gt;&lt;/blockquote&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="704379">DOCS-12513</key>
            <summary>Docs for SERVER-39418: Ban atClusterTime with enableMajorityReadConcern:false</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                    </labels>
                <created>Mon, 25 Feb 2019 22:21:42 +0000</created>
                <updated>Mon, 13 Nov 2023 18:24:47 +0000</updated>
                            <resolved>Wed, 22 May 2019 14:59:02 +0000</resolved>
                                                    <fixVersion>4.1.9</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2256251" author="xgen-internal-githook" created="Wed, 22 May 2019 14:58:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12513&quot; title=&quot;Docs for SERVER-39418: Ban atClusterTime with enableMajorityReadConcern:false&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12513&quot;&gt;&lt;del&gt;DOCS-12513&lt;/del&gt;&lt;/a&gt;: 4.2 sharded txn enableMajorityReadConcern: false&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/219701e7fcbffcaeb74dc633f58b2fc44c170d52&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/219701e7fcbffcaeb74dc633f58b2fc44c170d52&lt;/a&gt;&lt;/p&gt;</comment>
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                            <issuelinktype id="10320">
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                                        <issuelink>
            <issuekey id="685462">SERVER-39418</issuekey>
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                            <issuelinktype id="10012">
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                                                                <inwardlinks description="is related to">
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            <issuekey id="709021">DOCS-12523</issuekey>
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