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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-25444] Resolving a view may create a pipeline that exceeds 16 MB</title>
                <link>https://jira.mongodb.org/browse/SERVER-25444</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When creating a sequence of views on views, the final resolved pipeline may exceed the maximum document size. This will be bad if the view is on a sharded collection, as the error response from the primary shard to mongos will be too large to handle.&lt;/p&gt;

&lt;p&gt;We should impose some sort of limit when creating/modifying a view definition and/or check the size of the resolved view on resolution and fail if it is too large.&lt;/p&gt;</description>
                <environment></environment>
        <key id="306563">SERVER-25444</key>
            <summary>Resolving a view may create a pipeline that exceeds 16 MB</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="9">Done</resolution>
                                        <assignee username="sam.rossi@mongodb.com">Samuel Rossi</assignee>
                                    <reporter username="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                            <label>read-only-views</label>
                    </labels>
                <created>Thu, 4 Aug 2016 17:57:49 +0000</created>
                <updated>Sat, 19 Nov 2016 00:05:18 +0000</updated>
                            <resolved>Thu, 22 Sep 2016 19:35:12 +0000</resolved>
                                                    <fixVersion>3.3.15</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1391281" author="xgen-internal-githook" created="Thu, 22 Sep 2016 19:19:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;name&apos;: u&apos;Sam Rossi&apos;, u&apos;email&apos;: u&apos;sam.rossi@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25444&quot; title=&quot;Resolving a view may create a pipeline that exceeds 16 MB&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25444&quot;&gt;&lt;del&gt;SERVER-25444&lt;/del&gt;&lt;/a&gt; Enforce max size of view pipeline&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f986217cc7ad341aa19e2eba23be458e1ff1e0e4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f986217cc7ad341aa19e2eba23be458e1ff1e0e4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1350136" author="schwerin" created="Mon, 8 Aug 2016 14:51:24 +0000"  >&lt;p&gt;I think it will be hard to do this at view modification time, since you might be modifying the middle view that&apos;s part of many other views, and you&apos;d have to find all of them and validate them. Even then, users might still manage to write to system.views directly and create illegally sized view pipelines.&lt;/p&gt;

&lt;p&gt;As such, I recommend that this check be complemented with work to ensure that the user gets a helpful error message when they attempt to query a view that is too large, regardless of whether the cluster is sharded or not.&lt;/p&gt;</comment>
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