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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-14433] Investigate changes in SERVER-55578: Disallow atClusterTime reads on the config.transactions collection</title>
                <link>https://jira.mongodb.org/browse/DOCS-14433</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;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;    Non-transaction reads on config.transactions collection with readConcern snapshot are disallowed.&lt;br/&gt;
Non-transaction reads on config.transactions collection with readConcern majority and afterClusterTime (e.g. in a causal consistent session) are disallowed.&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;    The changes from &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55305&quot; title=&quot;Retryable write may execute more than once if primary had transitioned through rollback to stable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55305&quot;&gt;&lt;del&gt;SERVER-55305&lt;/del&gt;&lt;/a&gt; will address how a retryable write statement may execute multiple times without making atClusterTime reads on the config.transactions collection correct for all readTimestamps. To prevent accidental misuse of atClusterTime reads, they should be rejected on the config.transactions collection.&lt;/p&gt;

&lt;p&gt;Note however that resharding depends on performing an atClusterTime read on the config.transactions collection (see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55214?focusedCommentId=3687386&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-3687386&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;SERVER-55214&lt;/a&gt;) and will need an undocumented option (or some internal privilege way) of continuing to use atClusterTime reads on the config.transactions collection.&lt;/p&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="1708022">DOCS-14433</key>
            <summary>Investigate changes in SERVER-55578: Disallow atClusterTime reads on the config.transactions collection</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="ian.fogelman@mongodb.com">Ian Fogelman</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Mon, 10 May 2021 00:22:01 +0000</created>
                <updated>Mon, 13 Nov 2023 17:55:04 +0000</updated>
                            <resolved>Thu, 2 Sep 2021 15:06:44 +0000</resolved>
                                                    <fixVersion>5.0.0-rc0</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>2</watches>
                                                                                                                <comments>
                            <comment id="4036552" author="xgen-internal-githook" created="Thu, 2 Sep 2021 14:59:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ian fogelman&apos;, &apos;email&apos;: &apos;ian.fogelman@mongodb.com&apos;, &apos;username&apos;: &apos;ianf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14433&quot; title=&quot;Investigate changes in SERVER-55578: Disallow atClusterTime reads on the config.transactions collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14433&quot;&gt;&lt;del&gt;DOCS-14433&lt;/del&gt;&lt;/a&gt; config.transactions read concern disallowed&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d7adbb9f00662cf08d659f464a86ca6327dd4e6f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d7adbb9f00662cf08d659f464a86ca6327dd4e6f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4036548" author="xgen-internal-githook" created="Thu, 2 Sep 2021 14:59:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ian fogelman&apos;, &apos;email&apos;: &apos;ian.fogelman@mongodb.com&apos;, &apos;username&apos;: &apos;ianf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14433&quot; title=&quot;Investigate changes in SERVER-55578: Disallow atClusterTime reads on the config.transactions collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14433&quot;&gt;&lt;del&gt;DOCS-14433&lt;/del&gt;&lt;/a&gt; config.transactions read concern disallowed&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/635b322c4e3fd4db7bb2a1f1ca3d8e9601d867ac&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/635b322c4e3fd4db7bb2a1f1ca3d8e9601d867ac&lt;/a&gt;&lt;/p&gt;</comment>
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