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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-77616] findOneAndUpdate with no-op update does not seem to work against stale reads</title>
                <link>https://jira.mongodb.org/browse/SERVER-77616</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The&apos;s this part of a documentation:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://www.mongodb.com/docs/manual/core/transactions-production-consideration/#in-progress-transactions-and-stale-reads&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/docs/manual/core/transactions-production-consideration/#in-progress-transactions-and-stale-reads&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;However, when we tried to use this trick, it only proved to be working as intended if the update actually changes something in the document.&lt;/p&gt;

&lt;p&gt;Otherwise, despite being used exactly as in the example, such operation did not, in the test scenario, trigger a write conflict that would trigger a retry for a transaction.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Could some other factors be relevant which are absent from the documentation? I&apos;m willing to provide as full a context as I can.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2354498">SERVER-77616</key>
            <summary>findOneAndUpdate with no-op update does not seem to work against stale reads</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="petr.ivanov.s@gmail.com">Peter Ivanov</reporter>
                        <labels>
                            <label>documentation</label>
                            <label>transactions</label>
                    </labels>
                <created>Wed, 31 May 2023 09:50:12 +0000</created>
                <updated>Mon, 8 Jan 2024 17:49:20 +0000</updated>
                                            <version>5.0.18</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
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                            <customfieldvalue>&lt;p&gt;There&apos;s no code snippet at this point, but the idea is:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Start 2 transactions with &lt;span class=&quot;error&quot;&gt;&amp;#91;write: majority, read: primary, snapshot, causal consistency: true&amp;#93;&lt;/span&gt;&lt;/li&gt;
	&lt;li&gt;Make each of them &quot;read&quot; one document using &quot;fake&quot; findOneAndUpdate&lt;/li&gt;
	&lt;li&gt;Make each of them update the document another transaction has just &quot;read&quot;&lt;/li&gt;
	&lt;li&gt;No write conflict happens&lt;/li&gt;
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&lt;p&gt;And if we change the step 2 so that findOneAndUpdate actually changes the document, step 4 works as intended, and one of the transactions fails.&#160;&lt;/p&gt;</customfieldvalue>

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