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    <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>
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<item>
            <title>[SERVER-37429] $avg of Infinity and null is NaN on debug builds</title>
                <link>https://jira.mongodb.org/browse/SERVER-37429</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="612935">SERVER-37429</key>
            <summary>$avg of Infinity and null is NaN on debug builds</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="robert.guo@mongodb.com">Robert Guo</reporter>
                        <labels>
                            <label>afz</label>
                            <label>query-44-grooming</label>
                    </labels>
                <created>Tue, 2 Oct 2018 20:14:57 +0000</created>
                <updated>Tue, 6 Dec 2022 03:16:44 +0000</updated>
                                            <version>4.0.2</version>
                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2383475" author="robert.guo" created="Thu, 22 Aug 2019 21:49:45 +0000"  >&lt;p&gt;We already disabled the debug agg multiversion fuzzer on debug builds in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37668&quot; title=&quot;Disable the aggregation fuzzer on Windows 2008R2 DEBUG&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37668&quot;&gt;&lt;del&gt;SERVER-37668&lt;/del&gt;&lt;/a&gt;. There are no immediate plans to re-enable debug builds. No BFs are caused by this ticket at the moment.&lt;/p&gt;

&lt;p&gt;I think this ticket is for addressing the NaN vs Infinity discrepancy when spilling to disk. It&apos;s not related to debug vs non-debug based on Max&apos;s comment above.&lt;/p&gt;</comment>
                            <comment id="2383300" author="charlie.swanson" created="Thu, 22 Aug 2019 20:18:28 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.guo&quot; class=&quot;user-hover&quot; rel=&quot;robert.guo&quot;&gt;robert.guo&lt;/a&gt; our understanding is that failures like this will stop happening in evergreen soon due to disabling debug variants of the multi version fuzzer. Can you confirm?&lt;/p&gt;

&lt;p&gt;If that&apos;s correct we&apos;re going to keep this on the backlog until we make time for configuring a spilling to disk variant of the aggregation fuzzer.&lt;/p&gt;</comment>
                            <comment id="2367995" author="max.hirschhorn@10gen.com" created="Tue, 13 Aug 2019 01:42:41 +0000"  >&lt;p&gt;I think this ticket was sitting on the STM team backlog in order for us to do some further investigation. After &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson&quot;&gt;charlie.swanson&lt;/a&gt; mentioned how &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f934c241d2ac3e0aa6be09fcf0103e037033175b/src/mongo/db/pipeline/document_source_group.cpp#L523-L532&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the &lt;tt&gt;$group&lt;/tt&gt; stage always spills to disk in &lt;tt&gt;&amp;#45;&amp;#45;dbg=on&lt;/tt&gt; builds&lt;/a&gt;, I believe that is what&apos;s happening here.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="898561">SERVER-42854</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="883162">SERVER-42616</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="621734">SERVER-37668</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="621833">SERVER-37672</issuekey>
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                            <customfieldvalue>&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;MongoDB Enterprise &amp;gt; db.test.find()&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; : 1, &quot;a&quot; : Infinity }&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; : 2, &quot;a&quot; : null }&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;MongoDB Enterprise &amp;gt; db.test.aggregate([{$group:{_id: null, num:{$avg:&quot;$a&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;{ &quot;_id&quot; : null, &quot;num&quot; : NaN } // debug build&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;{ &quot;_id&quot; : null, &quot;num&quot; : Infinity } // non-debug build, correct behavior.&lt;/span&gt;&lt;/pre&gt;
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