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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-69108] SCCL can immediately return config and admin metadata without triggering a refresh</title>
                <link>https://jira.mongodb.org/browse/SERVER-69108</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, in the case of the primary node, SCCL returns &lt;a href=&quot;https://github.dev/10gen/mongo/blob/b643f8b49308346a3ecf629fc2a929f3e384f564/src/mongo/s/catalog/sharding_catalog_client_impl.cpp#L325-L335&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;fixed metadata for the &lt;tt&gt;config&lt;/tt&gt; and &lt;tt&gt;admin&lt;/tt&gt; databases&lt;/a&gt;. On the other hand, secondary nodes invoke the &lt;tt&gt;_flushDatabaseCacheUpdates&lt;/tt&gt; command on primary to triggers &lt;a href=&quot;https://github.dev/10gen/mongo/blob/b643f8b49308346a3ecf629fc2a929f3e384f564/src/mongo/db/s/flush_database_cache_updates_command.cpp#L147&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;a refresh&lt;/a&gt; in order to get the same information in the corresponding &lt;tt&gt;config.cache.databases&lt;/tt&gt; entry.&lt;/p&gt;

&lt;p&gt;The logic of secondaries can be simplified by&#160; returning the fixed metadata immediately, as the primary node already does. This allows to avoid the refresh of the database metadata but having the same semantics.&lt;/p&gt;

&lt;p&gt;As a (desired) side effect, this allows &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66972&quot; title=&quot;Database critical section does not serialize with ongoing refreshes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66972&quot;&gt;&lt;del&gt;SERVER-66972&lt;/del&gt;&lt;/a&gt; to bypass the deadlock &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68661&quot; title=&quot;Deadlock with transactions after step down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68661&quot;&gt;&lt;del&gt;SERVER-68661&lt;/del&gt;&lt;/a&gt; (which is not resolved by this ticket).&lt;/p&gt;</description>
                <environment></environment>
        <key id="2120881">SERVER-69108</key>
            <summary>SCCL can immediately return config and admin metadata without triggering a refresh</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="antonio.fuschetto@mongodb.com">Antonio Fuschetto</assignee>
                                    <reporter username="antonio.fuschetto@mongodb.com">Antonio Fuschetto</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Aug 2022 08:33:05 +0000</created>
                <updated>Sun, 29 Oct 2023 21:34:03 +0000</updated>
                            <resolved>Mon, 29 Aug 2022 10:04:38 +0000</resolved>
                                                    <fixVersion>6.1.1</fixVersion>
                    <fixVersion>5.0.13</fixVersion>
                    <fixVersion>6.0.2</fixVersion>
                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4878909" author="xgen-internal-githook" created="Wed, 5 Oct 2022 08:14:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69108&quot; title=&quot;SCCL can immediately return config and admin metadata without triggering a refresh&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69108&quot;&gt;&lt;del&gt;SERVER-69108&lt;/del&gt;&lt;/a&gt; SCCL can immediately return config and admin metadata without triggering a refresh&lt;br/&gt;
Branch: v6.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/507a15787ce1842f2b8363b6274bbbf8c137fecc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/507a15787ce1842f2b8363b6274bbbf8c137fecc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4829409" author="xgen-internal-githook" created="Thu, 15 Sep 2022 07:42:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69108&quot; title=&quot;SCCL can immediately return config and admin metadata without triggering a refresh&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69108&quot;&gt;&lt;del&gt;SERVER-69108&lt;/del&gt;&lt;/a&gt; SCCL can immediately return config and admin metadata without triggering a refresh&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/aa8a3126a2857f235a14aca96cdcd897e42990cf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/aa8a3126a2857f235a14aca96cdcd897e42990cf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4829408" author="xgen-internal-githook" created="Thu, 15 Sep 2022 07:41:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69108&quot; title=&quot;SCCL can immediately return config and admin metadata without triggering a refresh&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69108&quot;&gt;&lt;del&gt;SERVER-69108&lt;/del&gt;&lt;/a&gt; SCCL can immediately return config and admin metadata without triggering a refresh&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9d97bffb2e39ce9b5b8ce37b4bfbed5342106a8a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9d97bffb2e39ce9b5b8ce37b4bfbed5342106a8a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4783017" author="xgen-internal-githook" created="Mon, 29 Aug 2022 08:50:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69108&quot; title=&quot;SCCL can immediately return config and admin metadata without triggering a refresh&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69108&quot;&gt;&lt;del&gt;SERVER-69108&lt;/del&gt;&lt;/a&gt; SCCL can immediately return config and admin metadata without triggering a refresh&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6acc65f52de00bd9caa45e582e65a8669424b4dc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6acc65f52de00bd9caa45e582e65a8669424b4dc&lt;/a&gt;&lt;/p&gt;</comment>
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