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<channel>
    <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-59834] $group with allowDiskUse doesn&apos;t clean up _tmp files</title>
                <link>https://jira.mongodb.org/browse/SERVER-59834</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;b&gt;&lt;font color=&quot;#DE350B&quot;&gt;UPDATE&lt;/font&gt;&lt;/b&gt;:  There&apos;s a dedicated test in master branch group_tmp_file_cleanup.js, however, it starts to fail only with memoryLimitMb &amp;gt;= 15.&lt;/p&gt;

&lt;p&gt;This seems to be a fairly general issue, because the following simple test reproduces the problem:&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;
		&lt;tbody &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;  margin-top: 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;function repro() {&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;&amp;nbsp;&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;    db.c.drop()&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;&amp;nbsp;&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;    print(&quot;inserting&quot;)&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;    doc = {x: &quot;x&quot;.repeat(1000)}&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;    many = Array(1000).fill(doc)&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;    for (var i = 0; i &amp;lt; 100; i++)&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;        db.c.insertMany(many)&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;&amp;nbsp;&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;    print(&quot;aggregating&quot;)&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;    r = db.c.aggregate([&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;
		&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;            $group: {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                &quot;_id&quot;: &quot;$_id&quot;,&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;                x: {$push: &quot;$x&quot;},&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;
		&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;
		&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;
		&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;        allowDiskUse: true&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;
		&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;   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;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="1869311">SERVER-59834</key>
            <summary>$group with allowDiskUse doesn&apos;t clean up _tmp files</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="alberto.massari@mongodb.com">Alberto Massari</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                            <label>query-director-triage</label>
                    </labels>
                <created>Wed, 8 Sep 2021 14:32:10 +0000</created>
                <updated>Sun, 29 Oct 2023 21:48:48 +0000</updated>
                            <resolved>Wed, 13 Jul 2022 08:39:33 +0000</resolved>
                                    <version>5.0.0</version>
                    <version>5.0.2</version>
                    <version>6.1.0-rc0</version>
                                    <fixVersion>5.0.12</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>1</votes>
                                    <watches>17</watches>
                                                                                                                <comments>
                            <comment id="4762647" author="xgen-internal-githook" created="Fri, 19 Aug 2022 08:55:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Alberto Massari&apos;, &apos;email&apos;: &apos;alberto.massari@mongodb.com&apos;, &apos;username&apos;: &apos;albymassari&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59834&quot; title=&quot;$group with allowDiskUse doesn&amp;#39;t clean up _tmp files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59834&quot;&gt;&lt;del&gt;SERVER-59834&lt;/del&gt;&lt;/a&gt; Backport test to v5.0&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0bc559a38b06ca9b408481c33e39d3187aa636be&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0bc559a38b06ca9b408481c33e39d3187aa636be&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4675965" author="xgen-internal-githook" created="Wed, 13 Jul 2022 08:37:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Alberto Massari&apos;, &apos;email&apos;: &apos;alberto.massari@mongodb.com&apos;, &apos;username&apos;: &apos;albymassari&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59834&quot; title=&quot;$group with allowDiskUse doesn&amp;#39;t clean up _tmp files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59834&quot;&gt;&lt;del&gt;SERVER-59834&lt;/del&gt;&lt;/a&gt;: ensure pipeline has completed before checking for leftover files&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/168088aca1c60bd984d279a35336f6f036ed7c62&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/168088aca1c60bd984d279a35336f6f036ed7c62&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4647620" author="JIRAUSER1263745" created="Wed, 29 Jun 2022 13:33:24 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=arun.banala%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;arun.banala@mongodb.com&quot;&gt;arun.banala@mongodb.com&lt;/a&gt; the problem still exists in master (and probably also on 5.0, but I don&apos;t remember if I checked it).&lt;/p&gt;</comment>
                            <comment id="4590189" author="kyle.suarez" created="Thu, 2 Jun 2022 15:32:23 +0000"  >&lt;p&gt;I reopened the backport request and sent it to the Query Execution triage queue. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=romans.kasperovics%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;romans.kasperovics@mongodb.com&quot;&gt;romans.kasperovics@mongodb.com&lt;/a&gt;, I assume it cherry-picks cleanly because it&apos;s a new file? If the backport passes cleanly in v5.0, I think it&apos;s worth backporting as Kelsey and Bruce have suggested.&lt;/p&gt;</comment>
                            <comment id="4590002" author="bruce.lucas@10gen.com" created="Thu, 2 Jun 2022 14:46:02 +0000"  >&lt;p&gt;Personally I think this is worth backporting.&lt;/p&gt;</comment>
                            <comment id="4568727" author="xgen-internal-githook" created="Tue, 24 May 2022 10:14:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;romanskas&apos;, &apos;email&apos;: &apos;30618745+romanskas@users.noreply.github.com&apos;, &apos;username&apos;: &apos;romanskas&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59834&quot; title=&quot;$group with allowDiskUse doesn&amp;#39;t clean up _tmp files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59834&quot;&gt;&lt;del&gt;SERVER-59834&lt;/del&gt;&lt;/a&gt; Add test for _tmp files cleanup for $group&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/218f4a72dcb54bb6f6b88354cda9296bce9fe606&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/218f4a72dcb54bb6f6b88354cda9296bce9fe606&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4207891" author="JIRAUSER1260908" created="Tue, 23 Nov 2021 17:10:52 +0000"  >&lt;p&gt;Remainder work is to confirm this is fixed and to add a test if none is missing &lt;/p&gt;</comment>
                            <comment id="4047413" author="bruce.lucas@10gen.com" created="Thu, 9 Sep 2021 14:29:14 +0000"  >&lt;p&gt;Great, thanks!&lt;/p&gt;</comment>
                            <comment id="4047367" author="gregory.noma" created="Thu, 9 Sep 2021 14:17:52 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt; I believe this was because previously, &lt;a href=&quot;https://github.com/mongodb/mongo/commit/62e0f0c801e85d8938ec8548b624556d6f05e1fc#diff-30a65066ee5287868b75f0c8d84d0504e2b19cd66f65ce6759fe9948273eaf01L626&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;DocumentSourceGroup&lt;/tt&gt; relinquished file deletion responsibilities to the &lt;tt&gt;MergeIterator&lt;/tt&gt;&lt;/a&gt;. Before 5.0, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/057ee3d434a3822bc007d7a34524b4eb0a1aa1ea/src/mongo/db/sorter/sorter.cpp#L411&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this behavior was correct&lt;/a&gt;. However the ownership of file deletion was changed at some point seemingly between 4.4 and 5.0 and, since we didn&apos;t have any testing for this, the issue went unnoticed. &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54791&quot; title=&quot;Excessive file descriptor usage during index build with external sort&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54791&quot;&gt;&lt;del&gt;SERVER-54791&lt;/del&gt;&lt;/a&gt; fixed this by &lt;a href=&quot;https://github.com/mongodb/mongo/commit/62e0f0c801e85d8938ec8548b624556d6f05e1fc#diff-743ecee41c9dd57bbb0554359361e4c70a7f1e69a76cfdbde0c5a398cff43fbaR994&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;consolidating file deletion responsibilities in the new &lt;tt&gt;Sorter::File&lt;/tt&gt; class&lt;/a&gt;. Even if it is fixed now, I agree that it would be prudent to add a test.&lt;/p&gt;</comment>
                            <comment id="4047151" author="bruce.lucas@10gen.com" created="Thu, 9 Sep 2021 13:13:10 +0000"  >&lt;p&gt;Also, should we add a test that _tmp files are properly cleaned up?&lt;/p&gt;</comment>
                            <comment id="4047146" author="bruce.lucas@10gen.com" created="Thu, 9 Sep 2021 13:11:35 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=gregory.noma&quot; class=&quot;user-hover&quot; rel=&quot;gregory.noma&quot;&gt;gregory.noma&lt;/a&gt;, that would be good news. Since that ticket wasn&apos;t particularly aimed at fixing this issue, it would be good to identify which particular aspect of that ticket fixed this issue.&lt;/p&gt;</comment>
                            <comment id="4046211" author="gregory.noma" created="Wed, 8 Sep 2021 22:42:03 +0000"  >&lt;p&gt;This may have been fixed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54791&quot; title=&quot;Excessive file descriptor usage during index build with external sort&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54791&quot;&gt;&lt;del&gt;SERVER-54791&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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