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    <link>https://jira.mongodb.org</link>
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    <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-77428] DeleteStage will omit returning deleted document if WCE occurs when restoring its children</title>
                <link>https://jira.mongodb.org/browse/SERVER-77428</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;DeleteStage handles WriteConflictExceptions/TemporarilyUnavailableExceptions when &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7b2ca5a5e3f8216321dce4b9a1d253376719fd82/src/mongo/db/exec/delete_stage.cpp#L313&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;restoring its children state&lt;/a&gt; by returning NEED_YIELD. If the stage needs to return the deleted document, it &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7b2ca5a5e3f8216321dce4b9a1d253376719fd82/src/mongo/db/exec/delete_stage.cpp#L325&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;annotates it on `_idReturning`&lt;/a&gt; so that on the next `doWork` it is &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7b2ca5a5e3f8216321dce4b9a1d253376719fd82/src/mongo/db/exec/delete_stage.cpp#L111-L123&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;returned&lt;/a&gt;. However, if the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7b2ca5a5e3f8216321dce4b9a1d253376719fd82/src/mongo/db/exec/delete_stage.cpp#L99-L100&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;delete was &quot;justOne: true&quot;&lt;/a&gt;, the next `doWork` will immediately &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7b2ca5a5e3f8216321dce4b9a1d253376719fd82/src/mongo/db/exec/delete_stage.cpp#L107-L109&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;return EOF&lt;/a&gt; instead of the pending document.&lt;/p&gt;

&lt;p&gt;If this happened, findAndModify would delete the document but not return it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2349375">SERVER-77428</key>
            <summary>DeleteStage will omit returning deleted document if WCE occurs when restoring its children</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="13203">Gone away</resolution>
                                        <assignee username="denis.grebennicov@mongodb.com">Denis Grebennicov</assignee>
                                    <reporter username="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 May 2023 15:08:32 +0000</created>
                <updated>Fri, 27 Oct 2023 20:44:45 +0000</updated>
                            <resolved>Fri, 14 Jul 2023 15:00:44 +0000</resolved>
                                    <version>4.4.0</version>
                    <version>5.0.0</version>
                    <version>6.0.0</version>
                    <version>7.0.0-rc0</version>
                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5463158" author="JIRAUSER1257318" created="Wed, 31 May 2023 07:31:02 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=amr.elhelw%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;amr.elhelw@mongodb.com&quot;&gt;amr.elhelw@mongodb.com&lt;/a&gt; it is my understanding that WT calls can fail with TemporarilyUnavaliable exception when under cache pressure. The storage execution team may know how to induce that situation. Alternatively, one could use a failpoint to throw TemporarilyUnavailable &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7b2ca5a5e3f8216321dce4b9a1d253376719fd82/src/mongo/db/exec/delete_stage.cpp#L313&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="5461545" author="JIRAUSER1272798" created="Tue, 30 May 2023 18:59:47 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jordi.serra-torrens%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;jordi.serra-torrens@mongodb.com&quot;&gt;jordi.serra-torrens@mongodb.com&lt;/a&gt; Do you have a way to reproduce this behavior?&lt;/p&gt;</comment>
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            <issuekey id="2378085">SERVER-78470</issuekey>
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