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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-57063] Ensure that config.collections exists upon configsvr startup</title>
                <link>https://jira.mongodb.org/browse/SERVER-57063</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On a brand new cluster, the config.collections collection on the configsvr is currently implicitly created when sharding the very first collection. There is a situation where attempting to refresh the CatalogCache (which does a Snapshot read on config.collections) from a CSRS node that has:&lt;br/&gt;
i) replicated the implicit creation of config.collections&lt;br/&gt;
ii) but not advanced its majority commit point to be inclusive of it&lt;br/&gt;
can fail with SnapshotUnavailable.&lt;br/&gt;
This situation will eventually resolve once the CSRS secondaries advance their majority commit point past the creation of config.collections.&lt;/p&gt;

&lt;p&gt;To avoid this situation, we should make sure that config.collections exists upon configsvr startup.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1731330">SERVER-57063</key>
            <summary>Ensure that config.collections exists upon configsvr startup</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="13201">Fixed</resolution>
                                        <assignee username="simon.gratzer@mongodb.com">Simon Gratzer</assignee>
                                    <reporter username="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</reporter>
                        <labels>
                            <label>post-rc0</label>
                            <label>sharding-csrs-stepdown-only</label>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Wed, 19 May 2021 13:35:57 +0000</created>
                <updated>Sun, 29 Oct 2023 21:53:20 +0000</updated>
                            <resolved>Mon, 31 May 2021 09:35:44 +0000</resolved>
                                    <version>5.0.0</version>
                                    <fixVersion>5.0.0-rc1</fixVersion>
                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4108289" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 19:02:45 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3849497" author="xgen-internal-githook" created="Mon, 31 May 2021 09:56:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Simon Graetzer&apos;, &apos;email&apos;: &apos;simon.gratzer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57063&quot; title=&quot;Ensure that config.collections exists upon configsvr startup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57063&quot;&gt;&lt;del&gt;SERVER-57063&lt;/del&gt;&lt;/a&gt; Ensure that config.collections exists upon configsvr startup (BACKPORT-9383)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/167c29ea15bccb6d58ca056d767ed27bd208f265&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/167c29ea15bccb6d58ca056d767ed27bd208f265&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3849398" author="xgen-internal-githook" created="Mon, 31 May 2021 08:50:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Simon Graetzer&apos;, &apos;email&apos;: &apos;simon.gratzer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57063&quot; title=&quot;Ensure that config.collections exists upon configsvr startup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57063&quot;&gt;&lt;del&gt;SERVER-57063&lt;/del&gt;&lt;/a&gt; Ensure that config.collections exists upon configsvr startup&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a10eaa3cc0e78d4ab1cd2f57b61a1e5e9568e192&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a10eaa3cc0e78d4ab1cd2f57b61a1e5e9568e192&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3844885" author="JIRAUSER1259843" created="Thu, 27 May 2021 14:52:16 +0000"  >&lt;p&gt;&lt;a href=&quot;https://mongodbcr.appspot.com/773440001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/773440001/&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3791267" author="JIRAUSER1257318" created="Wed, 19 May 2021 13:38:09 +0000"  >&lt;p&gt;A proposal is to create config.collections locally &lt;a href=&quot;https://github.com/mongodb/mongo/blob/eb4e1c293ebaf9815983197f871533c3e6a23aec/src/mongo/db/s/config/sharding_catalog_manager.cpp#L372&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. Note that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/eb4e1c293ebaf9815983197f871533c3e6a23aec/src/mongo/db/s/config/sharding_catalog_manager.cpp#L373&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, similarly, by building indexes on config.chunks we are effectively already creating the config.chunks collections.&lt;/p&gt;</comment>
                    </comments>
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