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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>[SERVER-61458] Calling RSLocalClient::queryOnce(kMajorityReadConcern) causes subsequent local writes in same OperationContext to also read stale data</title>
                <link>https://jira.mongodb.org/browse/SERVER-61458</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r5.0.4/src/mongo/db/rs_local_client.cpp#L106&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;RSLocalClient::queryOnce(kMajorityReadConcern) will modify the ReadSource for the RecoveryUnit to be kMajorityCommitted&lt;/a&gt;. It won&apos;t restore the original ReadSource upon returning from the function. This issue was discovered during &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59831&quot; title=&quot;WTUniqueIndex::_insert expects secondaries to pass in dupsAllowed=true&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59831&quot;&gt;&lt;del&gt;SERVER-59831&lt;/del&gt;&lt;/a&gt; because it caused a later write using the same OperationContext to still be using kMajorityCommitted as its ReadSource and for the later write not to see the effects of an earlier write from secondary batch application.&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;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;if&lt;/span&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; (readConcernLevel == repl::ReadConcernLevel::kMajorityReadConcern) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;   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;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// Set up operation context with majority read snapshot so correct optime can be retrieved.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;   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;    opCtx-&amp;gt;recoveryUnit()-&amp;gt;setTimestampReadSource(RecoveryUnit::ReadSource::kMajorityCommitted);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;   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;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;My thought here would be to introduce a new RAII type to enable the ReadSource to be temporarily overridden and to use it in RSLocalClient::queryOnce().&lt;/p&gt;</description>
                <environment></environment>
        <key id="1924373">SERVER-61458</key>
            <summary>Calling RSLocalClient::queryOnce(kMajorityReadConcern) causes subsequent local writes in same OperationContext to also read stale data</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="yuhong.zhang@mongodb.com">Yuhong Zhang</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                    </labels>
                <created>Fri, 12 Nov 2021 21:02:41 +0000</created>
                <updated>Sun, 29 Oct 2023 21:46:05 +0000</updated>
                            <resolved>Thu, 25 Nov 2021 02:54:59 +0000</resolved>
                                    <version>4.0.0</version>
                    <version>4.2.0</version>
                    <version>4.4.0</version>
                    <version>5.0.0</version>
                    <version>5.1.0</version>
                                    <fixVersion>5.2.0</fixVersion>
                                    <component>Internal Client</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4210848" author="xgen-internal-githook" created="Wed, 24 Nov 2021 20:20:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61458&quot; title=&quot;Calling RSLocalClient::queryOnce(kMajorityReadConcern) causes subsequent local writes in same OperationContext to also read stale data&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61458&quot;&gt;&lt;del&gt;SERVER-61458&lt;/del&gt;&lt;/a&gt; Reset read source after using kMajorityReadConcern in RSLocalClient::queryOnce()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3a7b71e5ff579a56fa1fe4d5d6c4cf3337a0f016&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3a7b71e5ff579a56fa1fe4d5d6c4cf3337a0f016&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4195535" author="JIRAUSER1253424" created="Wed, 17 Nov 2021 16:54:10 +0000"  >&lt;p&gt;The RAII type &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/catalog_raii.h#L426&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ReadSourceScope&lt;/a&gt;&#160;can be used here.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1868910">SERVER-59831</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1924378">SERVER-61459</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1774115">SERVER-57566</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1931342">SERVER-61704</issuekey>
        </issuelink>
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