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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-83927] Investigate/fix memory error with opt off and 1000 FilterNodes</title>
                <link>https://jira.mongodb.org/browse/SERVER-83927</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-83839&quot; title=&quot;Implement query-knob guarded logic to skip Sargable rewrites&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-83839&quot;&gt;&lt;del&gt;SERVER-83839&lt;/del&gt;&lt;/a&gt; it was found that when we have a pipeline with a large number of match expressions, and pipeline optimization disabled, as well as the query knob introduced in that ticket enabled (so we don&apos;t have Filter -&amp;gt; Sargable node rewrites) this results in a &lt;a href=&quot;https://parsley.mongodb.com/resmoke/4914db52078da6fe483254bd84189afc/test/179e4c2e1f8dca000d5661fc7ffc5289?bookmarks=0%2C1799&amp;amp;selectedLineRange=L888&amp;amp;shareLine=888&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;memory error&lt;/a&gt; during optimization because we generate one FilterNode per DocumentSourceMatch (when pipeline opt is off, we don&apos;t merge the stages).&lt;/p&gt;

&lt;p&gt;This should not be a bug in practice, since we run with optimization enabled outside of testing environments; however, this could turn out to be an issue during fuzzer testing. Furthermore, the optimizer probably should not be reliant on pipeline optimization occurring in order to obtain correct results.&lt;/p&gt;

&lt;p&gt;Furtehrmore, if some other mechanism for generating a large number of filter nodes exists, this would actually be an issue.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2517790">SERVER-83927</key>
            <summary>Investigate/fix memory error with opt off and 1000 FilterNodes</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="alya.berciu@mongodb.com">Alya Berciu</reporter>
                        <labels>
                            <label>greenerbuild</label>
                            <label>tech-debt</label>
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                <created>Wed, 6 Dec 2023 14:55:08 +0000</created>
                <updated>Tue, 12 Dec 2023 15:46:42 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>3</watches>
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