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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-39281] Interrupt during rename part of map-reduce with &quot;replace&quot; not handled gracefully</title>
                <link>https://jira.mongodb.org/browse/SERVER-39281</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a map-reduce has &quot;replace&quot; for its output, it writes to a temp collection that gets renamed to the output collection./ This rename has two problems:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/ac2279fdb62d64555e55077ba1113940a24afb04/src/mongo/db/commands/mr.cpp#L716-L723&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/ac2279fdb62d64555e55077ba1113940a24afb04/src/mongo/db/commands/mr.cpp#L716-L723&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;1) If the rename gets interrupted, the m/r operation swallows the Interrupted error and instead results in a non-specific error. Calling code doesn&apos;t know that the failure was caused by an interrupt.&lt;/p&gt;

&lt;p&gt;2) The output collection has already been deleted. We don&apos;t explicitly guarantee that the replacement is atomic, but it&apos;s kind of a shame if an interrupt occurs after the old collection has been deleted but before the new output has been renamed, leaving the user with no data.&lt;/p&gt;</description>
                <environment></environment>
        <key id="679989">SERVER-39281</key>
            <summary>Interrupt during rename part of map-reduce with &quot;replace&quot; not handled gracefully</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="justin.seyster@mongodb.com">Justin Seyster</reporter>
                        <labels>
                            <label>query-44-grooming</label>
                    </labels>
                <created>Wed, 30 Jan 2019 00:50:11 +0000</created>
                <updated>Tue, 6 Dec 2022 03:07:00 +0000</updated>
                            <resolved>Fri, 21 Jun 2019 22:26:27 +0000</resolved>
                                                                    <component>MapReduce</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2293768" author="david.storch" created="Fri, 21 Jun 2019 22:26:28 +0000"  >&lt;p&gt;Closing as Won&apos;t Fix, as I don&apos;t think we&apos;re pursuing code changes to the old mapReduce implementation right now. The query team has plans to replace our mapReduce implementation with a more modern one that shares infrastructure with the aggregation subsystem.&lt;/p&gt;</comment>
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