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    <link>https://jira.mongodb.org</link>
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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-45611] Lazily enforce that persisted collection validators are well formed</title>
                <link>https://jira.mongodb.org/browse/SERVER-45611</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45588&quot; title=&quot;Use of invalid regex in schema validator can prevent upgrade&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45588&quot;&gt;&lt;del&gt;SERVER-45588&lt;/del&gt;&lt;/a&gt; came out of a case where a user had persisted collection validators that were considered valid in 4.0 but not in 4.2 because some checks around RegexMatchExpressions were made tighter in 4.2. This prevented upgrade.&lt;/p&gt;

&lt;p&gt;To avoid this kind of situation in the future, we should not enforce that collection validators which have been persisted are valid until we attempt to use them (when insertions are done). We should still enforce that validators are well formed when setting/creating them (through collMod or createCollection).&lt;/p&gt;

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

&lt;p&gt;It looks like this would be relatively straightforward given the way &lt;a href=&quot;https://github.com/mongodb/mongo/blob/90738ed5ec26818b06d521f6ce6e5c37b2ce7697/src/mongo/db/catalog/collection_impl.cpp#L235-L236&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;CollectionImpl&lt;/a&gt;&#160;enforces that validators are well formed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1099963">SERVER-45611</key>
            <summary>Lazily enforce that persisted collection validators are well formed</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="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="ian.boros@mongodb.com">Ian Boros</assignee>
                                    <reporter username="ian.boros@mongodb.com">Ian Boros</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 Jan 2020 19:04:00 +0000</created>
                <updated>Sun, 29 Oct 2023 22:13:11 +0000</updated>
                            <resolved>Tue, 28 Jan 2020 16:55:49 +0000</resolved>
                                                    <fixVersion>4.2.4</fixVersion>
                    <fixVersion>4.3.4</fixVersion>
                                    <component>Querying</component>
                    <component>Write Ops</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2905270" author="xgen-internal-githook" created="Mon, 24 Feb 2020 17:37:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ian Boros&apos;, &apos;username&apos;: &apos;puppyofkosh&apos;, &apos;email&apos;: &apos;ian.boros@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45611&quot; title=&quot;Lazily enforce that persisted collection validators are well formed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45611&quot;&gt;&lt;del&gt;SERVER-45611&lt;/del&gt;&lt;/a&gt; lazily enforce that collection validators are valid&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bbdb6a411e614fcf048a8fe1ee363fac2ff0020c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bbdb6a411e614fcf048a8fe1ee363fac2ff0020c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2773424" author="louis.williams" created="Thu, 30 Jan 2020 18:16:15 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ian.boros&quot; class=&quot;user-hover&quot; rel=&quot;ian.boros&quot;&gt;ian.boros&lt;/a&gt; not unless there are any significant changes.&lt;/p&gt;</comment>
                            <comment id="2773384" author="ian.boros" created="Thu, 30 Jan 2020 18:08:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=louis.williams&quot; class=&quot;user-hover&quot; rel=&quot;louis.williams&quot;&gt;louis.williams&lt;/a&gt;&#160;do you have any objections to backporting this to 4.2?&lt;/p&gt;</comment>
                            <comment id="2766991" author="xgen-internal-githook" created="Mon, 27 Jan 2020 23:41:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;puppyofkosh&apos;, &apos;name&apos;: &apos;Ian Boros&apos;, &apos;email&apos;: &apos;ian.boros@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45611&quot; title=&quot;Lazily enforce that persisted collection validators are well formed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45611&quot;&gt;&lt;del&gt;SERVER-45611&lt;/del&gt;&lt;/a&gt; lazily enforce that collection validators are valid&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/582a071fa36630d302a25c9a6aec992fcd07a1e5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/582a071fa36630d302a25c9a6aec992fcd07a1e5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2735530" author="ian.boros" created="Thu, 16 Jan 2020 19:06:02 +0000"  >&lt;p&gt;CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=louis.williams&quot; class=&quot;user-hover&quot; rel=&quot;louis.williams&quot;&gt;louis.williams&lt;/a&gt; as we discussed this a bit yesterday.&lt;/p&gt;</comment>
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