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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-74566] Audit all uses of ShardRegistry configShard on config server to verify they are safe to use ShardRemote</title>
                <link>https://jira.mongodb.org/browse/SERVER-74566</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This project changed getting the config shard from the shard registry on the config server to return a ShardRemote instead of a ShardLocal. This means operations that were previously always process local, may now target other config server nodes. This could be problematic, e.g. if code relies on receiving a replication state change error after a failover, but now will retarget the new primary. We should audit visually and via invariants, etc. that all uses of ShardLocal before &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71891&quot; title=&quot;Use a local client explicitly in ShardingCatalogManager&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71891&quot;&gt;&lt;del&gt;SERVER-71891&lt;/del&gt;&lt;/a&gt; are safe to use ShardRemote.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2279977">SERVER-74566</key>
            <summary>Audit all uses of ShardRegistry configShard on config server to verify they are safe to use ShardRemote</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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Thu, 2 Mar 2023 19:50:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:25:23 +0000</updated>
                            <resolved>Mon, 27 Mar 2023 21:17:36 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5296510" author="xgen-internal-githook" created="Thu, 23 Mar 2023 17:48:01 +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-74566&quot; title=&quot;Audit all uses of ShardRegistry configShard on config server to verify they are safe to use ShardRemote&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74566&quot;&gt;&lt;del&gt;SERVER-74566&lt;/del&gt;&lt;/a&gt; Use ShardLocal in more places that may have relied on it&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1439bd4fc4f6d98bf1d51ab8fe608f4ad2235bc8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1439bd4fc4f6d98bf1d51ab8fe608f4ad2235bc8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5245055" author="jack.mulrow" created="Thu, 2 Mar 2023 20:56:17 +0000"  >&lt;p&gt;There&apos;s an invariant in ShardRemote that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5c4d7fcb0ed77081dfe435a2e3056ae40b4af68a/src/mongo/s/client/shard_remote.cpp#L352&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we always use readConcern majority&lt;/a&gt; for &quot;exhaustive&quot; finds on the config server that helped find places that relied on using a ShardLocal. We should think of other invariants / checks we can add to find other places, e.g. anything using local write concern probably expected to use a ShardLocal.&lt;/p&gt;</comment>
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