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    <title>MongoDB Jira</title>
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    <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-57291] Investigate stack overflow in SBE plans</title>
                <link>https://jira.mongodb.org/browse/SERVER-57291</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As discussed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57225&quot; title=&quot;SBE plans may trigger stack overflow&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57225&quot;&gt;&lt;del&gt;SERVER-57225&lt;/del&gt;&lt;/a&gt;, SBE plans with large top-level ANDs may result in a stack overflow. While fixing this particular scenario is straightforward, there may be other queries which cause stack overflow in SBE that we have not discovered yet.&lt;/p&gt;

&lt;p&gt;We should spend some time investigating whether any such queries exist, and if so, build a more generic mechanism for tracking SBE tree depth during plan construction. If the plan exceeds some fixed depth, we&apos;d have to bail out and either use the classic engine (or, eventually fail the query).&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;A few ideas for queries which may be able to trigger this:&lt;/p&gt;

&lt;p&gt;-A query with a filter or projection on a very long path (&lt;tt&gt;a.b.c.d.e.f...&lt;/tt&gt;)&lt;/p&gt;

&lt;p&gt;-A query with many nested $and and $ors&lt;/p&gt;

&lt;p&gt;-A query with a $slice or positional projection on a very long path&lt;/p&gt;</description>
                <environment></environment>
        <key id="1761232">SERVER-57291</key>
            <summary>Investigate stack overflow in SBE plans</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="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="jennifer.peshansky@mongodb.com">Jennifer Peshansky</assignee>
                                    <reporter username="ian.boros@mongodb.com">Ian Boros</reporter>
                        <labels>
                            <label>sbe-post-v1</label>
                            <label>sbe-rollout</label>
                    </labels>
                <created>Fri, 28 May 2021 18:20:59 +0000</created>
                <updated>Sun, 29 Oct 2023 21:52:55 +0000</updated>
                            <resolved>Thu, 29 Jul 2021 19:19:25 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4107114" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:17:44 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3971472" author="xgen-internal-githook" created="Thu, 29 Jul 2021 19:15:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jennifer Peshansky&apos;, &apos;email&apos;: &apos;jennifer.peshansky@mongodb.com&apos;, &apos;username&apos;: &apos;jenniferpeshansky&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57291&quot; title=&quot;Investigate stack overflow in SBE plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57291&quot;&gt;&lt;del&gt;SERVER-57291&lt;/del&gt;&lt;/a&gt; Add path length check to expression_parser and tests.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c036bbad40012454725f24414e4cf4e8ab5ba9ac&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c036bbad40012454725f24414e4cf4e8ab5ba9ac&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3848277" author="ian.boros" created="Fri, 28 May 2021 18:21:41 +0000"  >&lt;p&gt;CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=anton.korshunov&quot; class=&quot;user-hover&quot; rel=&quot;anton.korshunov&quot;&gt;anton.korshunov&lt;/a&gt;&lt;/p&gt;</comment>
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