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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-48629] Ensure BSON nesting depth error messages refer to documented limit</title>
                <link>https://jira.mongodb.org/browse/SERVER-48629</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/reference/limits/#Nested-Depth-for-BSON-Documents&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Nested Depth for BSON Documents&lt;/a&gt; documents a fix limit of 100 with no mention of this being configurable. While this can be altered via the undocumented &lt;tt&gt;maxBSONDepth&lt;/tt&gt; server parameter, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=henrik.edin&quot; class=&quot;user-hover&quot; rel=&quot;henrik.edin&quot;&gt;henrik.edin&lt;/a&gt; clarified that it is mainly used for internal testing and the edge case of nested BSON (e.g. CodeWScope within a nesting level, where its scope has its own nesting).&lt;/p&gt;

&lt;p&gt;Quoting &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=divjot.arora&quot; class=&quot;user-hover&quot; rel=&quot;divjot.arora&quot;&gt;divjot.arora&lt;/a&gt; from the linked HELP ticket:&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;As I mentioned in a previous comment, the fact that it was documented to be 100 almost caused us to make a mistake in a feature implementation. These limits are also mentioned in the error messages themselves. Testing on a 4.2.6 server, I got this error when using a 201-level filter for the find command: (Overflow) BSONObj exceeded maximum nested object depth: 200 and this error when inserting a 200-level document: cannot insert document because it exceeds 180 levels of nesting. As an aside, I wasn&apos;t aware that the limits are different for inserting vs finding.&lt;/p&gt;

&lt;p&gt;Either way, these limits are incorrectly documented and also included in our error messages. Leaving this as-is just seems confusing.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;The requested action in this ticket is to ensure that any error messages that may be exposed to users consistently refer to the documented limit of 100.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1373898">SERVER-48629</key>
            <summary>Ensure BSON nesting depth error messages refer to documented limit</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="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-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="jmikola@mongodb.com">Jeremy Mikola</reporter>
                        <labels>
                    </labels>
                <created>Fri, 5 Jun 2020 20:21:35 +0000</created>
                <updated>Tue, 6 Dec 2022 02:24:56 +0000</updated>
                                                                            <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3195759" author="brooke.miller" created="Mon, 8 Jun 2020 19:37:56 +0000"  >&lt;p&gt;Re-assigned to Execution since they introduced the&#160;&lt;tt&gt;maxBSONDepth&lt;/tt&gt;&#160;server parameter.&lt;/p&gt;</comment>
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