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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-69754] Hedge the KeysCollectionCache refresh() with explicit local client</title>
                <link>https://jira.mongodb.org/browse/SERVER-69754</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In catalog shard mode, the key refresh will no longer use ShardLocal implementation underneath the keys loading machinery. The refresh() method will always first try to load keys explicitly remotely, and if the current cluster role is catalog shard (or config server), retry the keys loading locally.&lt;/p&gt;

&lt;p&gt;CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tommaso.tocci%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;tommaso.tocci@mongodb.com&quot;&gt;tommaso.tocci@mongodb.com&lt;/a&gt; this is a good illustration (see PR) of how the refactoring works in general to support the catalog shard. Scroll to sharding_initialization.cpp change, the existing code is using the KeysCollectionClientSharded to access keys, and because underneath it&apos;s using Shard interface to read keys, it is using remote client when running on shards or mongs, and direct client on config. &lt;/p&gt;

&lt;p&gt;After we refactor everything for catalog shard, the KeysCollectionClientSharded will be strictly remote, and KeysCollectionClientDirect strictly direct. At catalog shard the remote client will not work until the port is open, so the hedging with direct client will be triggered.&lt;/p&gt;

&lt;p&gt;I am aware of the speed penalty, this will be fixed with different ticket using keys pre-loading at start, as described in design doc. This PR is 1/2 of the implementation outlined in design.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2138035">SERVER-69754</key>
            <summary>Hedge the KeysCollectionCache refresh() with explicit local client</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="andrew.shuvalov@mongodb.com">Andrew Shuvalov</assignee>
                                    <reporter username="andrew.shuvalov@mongodb.com">Andrew Shuvalov</reporter>
                        <labels>
                            <label>sharding-nyc-subteam2</label>
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                <created>Thu, 15 Sep 2022 18:18:28 +0000</created>
                <updated>Mon, 7 Nov 2022 20:18:38 +0000</updated>
                            <resolved>Mon, 7 Nov 2022 20:18:37 +0000</resolved>
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