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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-40520] Avoid dropping temporary $out collection if everything succeeded</title>
                <link>https://jira.mongodb.org/browse/SERVER-40520</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It looks like ever since &lt;a href=&quot;https://github.com/mongodb/mongo/commit/9d31d0caa167e9661aaf0f10f260313133bd2a02&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this commit&lt;/a&gt; we started unconditionally dropping the target collection when we&apos;re finished with $out mode &quot;replaceCollection&quot;. Before this, we would only drop the temp namespace if the command didn&apos;t fully succeed since we reset &lt;tt&gt;_tempNS&lt;/tt&gt; after finishing the inserts. Because &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ca931f5259bd4c40ea5e710f04608143202fd2aa/src/mongo/db/pipeline/document_source_out.cpp#L43-L49&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;all of this is happening within the DESTRUCTOR_GUARD&lt;/a&gt;, the exception is swallowed and there is no error reported back to the client. So there is no actual impact of this change, but we could probably gain back a little performance and sanity by avoiding dropping a non-existent collection at the end of every $out.&lt;/p&gt;</description>
                <environment></environment>
        <key id="732447">SERVER-40520</key>
            <summary>Avoid dropping temporary $out collection if everything succeeded</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="ian.boros@mongodb.com">Ian Boros</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                    </labels>
                <created>Mon, 8 Apr 2019 13:00:54 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:13 +0000</updated>
                            <resolved>Tue, 23 Apr 2019 21:32:18 +0000</resolved>
                                                    <fixVersion>4.1.11</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2222577" author="xgen-internal-githook" created="Tue, 23 Apr 2019 21:31:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;puppyofkosh@gmail.com&apos;, &apos;name&apos;: &apos;Ian Boros&apos;, &apos;username&apos;: &apos;puppyofkosh&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40520&quot; title=&quot;Avoid dropping temporary $out collection if everything succeeded&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40520&quot;&gt;&lt;del&gt;SERVER-40520&lt;/del&gt;&lt;/a&gt; avoid dropping temp collection when $out succeeds&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f419199b6b533258c4d6a5fd31684ef1fdb75cc3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f419199b6b533258c4d6a5fd31684ef1fdb75cc3&lt;/a&gt;&lt;/p&gt;</comment>
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