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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-49970] Prefer the VectorClock&apos;s ConfigTime to configOpTime when querying config servers</title>
                <link>https://jira.mongodb.org/browse/SERVER-49970</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, querying the config servers still uses &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fbf56a4/src/mongo/s/grid.cpp#L117&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;configOpTime()&lt;/a&gt; for the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fbf56a4/src/mongo/s/client/shard_remote.cpp#L365&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;readConcern afterOpTime&lt;/a&gt;.  However, if there is an initialized value (ie. not kUninitialized) for the VectorClock&apos;s &lt;a href=&quot;https://github.com/mongodb/mongo/blob/86d9476/src/mongo/db/vector_clock.h#L89&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ConfigTime component&lt;/a&gt; (and FCV is initialised and indicates kVersion451 or later), then that should instead be used (with afterClusterTime, not afterOpTime).  (For upgrade/downgrade purposes, if these conditions are not met, then the server should fall back to the existing behaviour of configOpTime() for afterOpTime.)&lt;/p&gt;

&lt;p&gt;configOpTime() is also used for the readPreference minOpTime (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/fbf56a4/src/mongo/s/client/shard_remote.cpp#L360&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fbf56a4/src/mongo/s/client/shard_remote.cpp#L428&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;).  It&apos;s not clear what should be done about these (since configOpTime() is to eventually be replaced by ConfigTime), but &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46499&quot; title=&quot;revisit minOpTime logic in serverSelector&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46499&quot;&gt;SERVER-46499&lt;/a&gt; should help guide this.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1423729">SERVER-49970</key>
            <summary>Prefer the VectorClock&apos;s ConfigTime to configOpTime when querying config servers</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="13201">Fixed</resolution>
                                        <assignee username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                            <label>PM-1645-Milestone-3</label>
                    </labels>
                <created>Wed, 29 Jul 2020 08:27:35 +0000</created>
                <updated>Sun, 29 Oct 2023 22:05:04 +0000</updated>
                            <resolved>Tue, 1 Sep 2020 22:29:18 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3370972" author="xgen-internal-githook" created="Tue, 1 Sep 2020 19:21:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49970&quot; title=&quot;Prefer the VectorClock&amp;#39;s ConfigTime to configOpTime when querying config servers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49970&quot;&gt;&lt;del&gt;SERVER-49970&lt;/del&gt;&lt;/a&gt; Prefer the VectorClock&apos;s ConfigTime to configOpTime when querying config servers \&lt;/p&gt;

&lt;p&gt;Co-authored-by: Pierlauro Sciarelli &amp;lt;pierlauro.sciarelli@mongodb.com&amp;gt;&lt;br/&gt;
Co-authored-by: Kevin Pulo &amp;lt;kevin.pulo@mongodb.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2013590813196d5cc63dcb7e9f3299b4db4a28c4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2013590813196d5cc63dcb7e9f3299b4db4a28c4&lt;/a&gt;&lt;/p&gt;</comment>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1482145">SERVER-51074</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1203967">SERVER-46499</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1579092">SERVER-53548</issuekey>
        </issuelink>
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