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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-12836] upgradeCheck() or collUpgradeCheck() should exclude changelog collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-12836</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;While normally changelog would be excluded because it lives in config database, it is very easy to restore the config DB into a differently named database and get an error from upgradeServer() check on every single document in that collection that has a shard key with . in the name&lt;/p&gt;

&lt;p&gt;(example if I shard on &quot;foo.bar&quot; where bar is embedded document inside foo, like &quot;user.screen_name&quot; in twitter json, for example).&lt;/p&gt;

&lt;p&gt;Suggestion: exclude collections named &quot;changelog&quot; &lt;b&gt;or&lt;/b&gt; ignore errors on documents in collection &quot;changelog&quot; if the error is embedded inside &quot;min&quot; or &quot;max&quot; top level fields.&lt;/p&gt;</description>
                <environment></environment>
        <key id="113003">SERVER-12836</key>
            <summary>upgradeCheck() or collUpgradeCheck() should exclude changelog collection</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="matt.dannenberg">Matt Dannenberg</assignee>
                                    <reporter username="asya.kamsky@mongodb.com">Asya Kamsky</reporter>
                        <labels>
                    </labels>
                <created>Fri, 21 Feb 2014 21:11:33 +0000</created>
                <updated>Wed, 10 Dec 2014 23:15:03 +0000</updated>
                            <resolved>Fri, 28 Feb 2014 15:56:52 +0000</resolved>
                                    <version>2.6.0-rc0</version>
                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="507140" author="mattd@10gen.com" created="Fri, 28 Feb 2014 15:56:52 +0000"  >&lt;p&gt;The consensus was that it was better to note false problems than miss real ones&lt;/p&gt;</comment>
                            <comment id="507010" author="asya" created="Fri, 28 Feb 2014 09:37:35 +0000"  >&lt;p&gt;Are you asking if any of them would legitimately be missing _id field/index?  As far as I can tell all of them have _id fields and it&apos;s indexed normally.&lt;/p&gt;

&lt;p&gt;The only error that they all have triggered is having &quot;illegal&quot; key names (ones with &quot;.&quot; in them).&lt;/p&gt;</comment>
                            <comment id="506783" author="mattd@10gen.com" created="Thu, 27 Feb 2014 22:46:05 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=asya&quot; class=&quot;user-hover&quot; rel=&quot;asya&quot;&gt;asya&lt;/a&gt; do these collections still have _id indexes (should I skip that check as well)?&lt;/p&gt;</comment>
                            <comment id="503441" author="asya" created="Fri, 21 Feb 2014 21:36:24 +0000"  >&lt;p&gt;By the same token, other config collections which mention the shard key should also be excluded:&lt;/p&gt;

&lt;p&gt;chunks&lt;br/&gt;
chunks-backup-*&lt;br/&gt;
collections&lt;br/&gt;
collections-backup-*&lt;/p&gt;

&lt;p&gt;For chunks min and max can have &quot;illegal&quot; keys.&lt;br/&gt;
For collections the field &quot;key&quot; can have illegal keys.&lt;/p&gt;</comment>
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            <issuekey id="63734">SERVER-8391</issuekey>
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