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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>
    </build-info>


<item>
            <title>[SERVER-73960] Support setFCV transitions when catalog shard feature flag is enabled</title>
                <link>https://jira.mongodb.org/browse/SERVER-73960</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the catalog shard feature flag is enabled, a config server will start up with shard components. If the config server is in the latest FCV, it will insert a shardIdentity document locally and consider itself a shard always. To support downgrading to a previous binary, we&apos;ll need to remove the shardIdentity document on FCV downgrade, unset ShardingState::enabled(), and ensure the config server can still function properly as a dedicated config server. We&apos;ll need to support the inverse when upgrading FCV, ie insert a shardIdentity document and verify the config server functions in both dedicated and catalog shard mode.&lt;/p&gt;

&lt;p&gt;Some specific problems to handle:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The config server will use a ShardServerCatalogCacheLoader (SSCCL) in all FCVs and we should add logic to the SSCCL to become a pure passthrough to its underlying ConfigServerCatalogCacheLoader when FCV is not fully upgraded. This will require gating its behavior on FCV and joining any in progress tasks during FCV upgrade and downgrade.&lt;/li&gt;
	&lt;li&gt;Shards &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b7b070ac8a54e06260e4abcbdcb4b34ac6cc4cc4/src/mongo/db/s/shard_server_op_observer.cpp#L672-L673&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;don&apos;t allow deleting the shardIdentity document&lt;/a&gt;, which we&apos;ll need to relax for this case.&lt;/li&gt;
	&lt;li&gt;ShardingState doesn&apos;t support unsetting &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b7b070ac8a54e06260e4abcbdcb4b34ac6cc4cc4/src/mongo/db/s/sharding_state.h#L83&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ShardingState::enabled()&lt;/a&gt; currently&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2263469">SERVER-73960</key>
            <summary>Support setFCV transitions when catalog shard feature flag is enabled</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Mon, 13 Feb 2023 20:39:47 +0000</created>
                <updated>Sun, 29 Oct 2023 21:26:23 +0000</updated>
                            <resolved>Mon, 3 Apr 2023 15:29:15 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5318212" author="xgen-internal-githook" created="Mon, 3 Apr 2023 02:08:33 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Jack Mulrow&apos;, &apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;username&apos;: &apos;jsmulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73960&quot; title=&quot;Support setFCV transitions when catalog shard feature flag is enabled&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73960&quot;&gt;&lt;del&gt;SERVER-73960&lt;/del&gt;&lt;/a&gt; Disable consistency checker in test&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/95c2e022727bc10e81ea01262d8cee194ab100f3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/95c2e022727bc10e81ea01262d8cee194ab100f3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5316292" author="xgen-internal-githook" created="Fri, 31 Mar 2023 18:10:57 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Randolph Tan&apos;, &apos;email&apos;: &apos;randolph@10gen.com&apos;, &apos;username&apos;: &apos;renctan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73960&quot; title=&quot;Support setFCV transitions when catalog shard feature flag is enabled&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73960&quot;&gt;&lt;del&gt;SERVER-73960&lt;/del&gt;&lt;/a&gt; Fix config server secondary catalog cache behavior for lower fcv&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a7bc01499b95c2d333c8c642507194021de8c282&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a7bc01499b95c2d333c8c642507194021de8c282&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5296611" author="xgen-internal-githook" created="Thu, 23 Mar 2023 18:22:58 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Randolph Tan&apos;, &apos;email&apos;: &apos;randolph@10gen.com&apos;, &apos;username&apos;: &apos;renctan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73960&quot; title=&quot;Support setFCV transitions when catalog shard feature flag is enabled&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73960&quot;&gt;&lt;del&gt;SERVER-73960&lt;/del&gt;&lt;/a&gt; Make config server always insert the shard identity document when catalogShard feature flag is on&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/89cb29b149ce70c1f85ca8f269fd7920787222e4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/89cb29b149ce70c1f85ca8f269fd7920787222e4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5290528" author="xgen-internal-githook" created="Wed, 22 Mar 2023 00:46:26 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Randolph Tan&apos;, &apos;email&apos;: &apos;randolph@10gen.com&apos;, &apos;username&apos;: &apos;renctan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73960&quot; title=&quot;Support setFCV transitions when catalog shard feature flag is enabled&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73960&quot;&gt;&lt;del&gt;SERVER-73960&lt;/del&gt;&lt;/a&gt; Support for catalog shard configuration for catalog cache loader&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dcf20ae1a8d96d4a3f5344e2f3dd3895fcbeff1d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dcf20ae1a8d96d4a3f5344e2f3dd3895fcbeff1d&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="2266578">SERVER-74105</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10020">
                    <name>Gantt Dependency</name>
                                            <outwardlinks description="has to be done before">
                                        <issuelink>
            <issuekey id="1699647">SERVER-56579</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2175529">SERVER-71106</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2303708">SERVER-75548</issuekey>
        </issuelink>
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