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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-43810] Check if openDB still throws a MustDowngrade error</title>
                <link>https://jira.mongodb.org/browse/SERVER-43810</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Potentially, there may be an extraneous &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/repair_database.cpp#L216&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;catch case&lt;/a&gt; that can be removed. &lt;/p&gt;

&lt;p&gt;Motivation: &lt;br/&gt;
Inside &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/repair_database.cpp#L173&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;repairDatabase&lt;/a&gt;&#160;there is a try catch that catches a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/repair_database.cpp#L216&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MustDowngrade&lt;/a&gt; Exception. The comment states &quot;openDb can throw an exception with a MustDowngrade status if a collection does not have a UUID.&quot; &lt;/p&gt;

&lt;p&gt;From a brief inspection, this seems to no longer be the case for &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/catalog/database_holder_impl.cpp#L110&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;openDB&lt;/a&gt;. Instead, it seem like &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/repair_database.cpp#L150&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;repairCollections&lt;/a&gt; calls &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/storage/storage_engine_impl.cpp#L719&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;repairRecordStore&lt;/a&gt; which then calls &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c1cefc2d974832bb62d73bea3498ec417c332e7b/src/mongo/db/storage/storage_engine_impl.cpp#L244&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_initCollection&lt;/a&gt;, where a MustDowngrade Error can occur.&lt;/p&gt;</description>
                <environment></environment>
        <key id="958334">SERVER-43810</key>
            <summary>Check if openDB still throws a MustDowngrade error</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="gabriel.marks@mongodb.com">Gabriel Marks</assignee>
                                    <reporter username="haley.connelly@mongodb.com">Haley Connelly</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Thu, 3 Oct 2019 17:59:38 +0000</created>
                <updated>Sun, 29 Oct 2023 22:16:28 +0000</updated>
                            <resolved>Fri, 22 Oct 2021 18:54:08 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4142665" author="xgen-internal-githook" created="Fri, 22 Oct 2021 17:26:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gabriel Marks&apos;, &apos;email&apos;: &apos;gabriel.marks@mongodb.com&apos;, &apos;username&apos;: &apos;marksg07&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43810&quot; title=&quot;Check if openDB still throws a MustDowngrade error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43810&quot;&gt;&lt;del&gt;SERVER-43810&lt;/del&gt;&lt;/a&gt; Remove unnecessary MustDowngrade error catch case in repairDatabase&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a08333605d63a78129999dd9dd2d513a4bf6616a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a08333605d63a78129999dd9dd2d513a4bf6616a&lt;/a&gt;&lt;/p&gt;</comment>
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