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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-77508] ReadConcern isn&apos;t propagated to DBDirectClient</title>
                <link>https://jira.mongodb.org/browse/SERVER-77508</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently DBDirectClient doesn&apos;t propagate the read concern used by the parent operation into DBDirectClient.&lt;/p&gt;

&lt;p&gt;This can be reproduced by performing a &lt;tt&gt;find&lt;/tt&gt; operation with a &lt;tt&gt;$where&lt;/tt&gt; clause. The command performs a &lt;tt&gt;DBDirectClient::find&lt;/tt&gt; call to the &lt;tt&gt;system.js&lt;/tt&gt; collection. Adding logging statements to get the operation read concern at the beginning of the find command shows this:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[j0:n0] | 2023-05-25T15:28:05.454+00:00 I  QUERY    0       [conn70] &quot;opCtx level comand start&quot;,&quot;attr&quot;:{&quot;readConcern&quot;:{&quot;level&quot;:&quot;majority&quot;,&quot;afterClusterTime&quot;:{&quot;$timestamp&quot;:{&quot;t&quot;:1685028485,&quot;i&quot;:19}},&quot;provenance&quot;:&quot;clientSupplied&quot;}}&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;...&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[j0:n0] | 2023-05-25T15:28:05.507+00:00 I  QUERY    0       [conn70] &quot;opCtx level comand start&quot;,&quot;attr&quot;:{&quot;readConcern&quot;:{&quot;provenance&quot;:&quot;implicitDefault&quot;}}&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;This can lead to potentially invalid reads performed by DBDirectClient.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2351288">SERVER-77508</key>
            <summary>ReadConcern isn&apos;t propagated to DBDirectClient</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="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</assignee>
                                    <reporter username="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</reporter>
                        <labels>
                    </labels>
                <created>Fri, 26 May 2023 08:55:34 +0000</created>
                <updated>Sun, 29 Oct 2023 21:20:53 +0000</updated>
                            <resolved>Tue, 30 May 2023 10:24:11 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5459749" author="xgen-internal-githook" created="Tue, 30 May 2023 10:20:05 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Olivares Provencio&apos;, &apos;email&apos;: &apos;jordi.olivares-provencio@mongodb.com&apos;, &apos;username&apos;: &apos;jordiolivares&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77508&quot; title=&quot;ReadConcern isn&amp;#39;t propagated to DBDirectClient&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77508&quot;&gt;&lt;del&gt;SERVER-77508&lt;/del&gt;&lt;/a&gt; Propagate readConcern to DBDirectClient&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0a463a0bffec419232515841afafd849c72f9b1a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0a463a0bffec419232515841afafd849c72f9b1a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5454964" author="JIRAUSER1264163" created="Fri, 26 May 2023 14:01:21 +0000"  >&lt;p&gt;Sure, this shouldn&apos;t be difficult as it&apos;s just touching &lt;a href=&quot;https://github.com/mongodb/mongo/blob/3d63e44eb5f871bd0e3f193f80088f134589a157/src/mongo/db/service_entry_point_common.cpp#L1698&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this branch&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5454894" author="max.hirschhorn@10gen.com" created="Fri, 26 May 2023 13:40:32 +0000"  >&lt;p&gt;Thanks for confirming &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jordi.olivares-provencio%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;jordi.olivares-provencio@mongodb.com&quot;&gt;jordi.olivares-provencio@mongodb.com&lt;/a&gt;! Can we make it so ServiceEntryPoint (or wherever) skips updating the ReadConcernArgs decoration when parsing a command issued with DBDirectClient? It seems incorrect that using DBDirectClient changes the decorations on the OperationContext because it is meant to be sharing the values with the parent operation.&lt;/p&gt;</comment>
                            <comment id="5454859" author="JIRAUSER1264163" created="Fri, 26 May 2023 13:29:07 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn@mongodb.com&quot;&gt;max.hirschhorn@mongodb.com&lt;/a&gt; That&apos;s precisely what&apos;s happening. The new command gets parsed and resets the ReadConcernArgs on the parent&apos;s opCtx.&lt;/p&gt;</comment>
                            <comment id="5454831" author="max.hirschhorn@10gen.com" created="Fri, 26 May 2023 13:16:12 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jordi.olivares-provencio%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;jordi.olivares-provencio@mongodb.com&quot;&gt;jordi.olivares-provencio@mongodb.com&lt;/a&gt;, would you please elaborate on why the read concern needs to be propagated to the DBDirectClient? My understanding is DBDirectClient is using the same OperationContext as the parent operation and therefore already inherits the value of the ReadConcernArgs decoration on the OperationContext. Is the &quot;opCtx level comand start&quot;  log output you&apos;ve shared showing that the ReadConcernArgs decoration is having its value reset when the DBDirectClient command is being run?&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="2351268">SERVER-77507</issuekey>
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