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    <title>MongoDB Jira</title>
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    <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-64132] Make shardsvrs running in serverless mode always return &quot;unsharded&quot; filtering metadata</title>
                <link>https://jira.mongodb.org/browse/SERVER-64132</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, mongod sometimes sets shardVersion UNSHARDED and does filtering metadata checks. If the filtering metadata is &quot;unknown&quot;, the mongod can return StaleConfig to the client. Make sure to handle config.system.sessions, which gets automatically sharded by the config server. Also always return &quot;ok&quot; for the dbVersion check if needed.&lt;/p&gt;

&lt;p&gt;Until user collections can be sharded in serverless, the sessions collection (config.system.sessions) will be the only sharded collection. While the architecture contains Atlas Proxy, shardsvrs must return unsharded metadata to avoid returning StaleConfig from the shardVersion check, since Atlas Proxy does not know how to handle StaleConfig. However, the logical session cache refresh and reap on internal nodes will load the sessions collection&apos;s real routing metadata and attach a real shardVersion on their requests to this node. So, for the sessions collection, this node must return its real routing metadata. It&apos;s ok if this node hasn&apos;t loaded the real routing metadata yet: this node will load the real routing metadata and return StaleConfig, and the sending node will handle StaleConfig by refreshing its routing metadata and retrying.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1993445">SERVER-64132</key>
            <summary>Make shardsvrs running in serverless mode always return &quot;unsharded&quot; filtering metadata</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="sophia.tan@mongodb.com">Sophia Tan</assignee>
                                    <reporter username="janna.golden@mongodb.com">Janna Golden</reporter>
                        <labels>
                    </labels>
                <created>Wed, 2 Mar 2022 21:52:44 +0000</created>
                <updated>Sun, 29 Oct 2023 21:41:43 +0000</updated>
                            <resolved>Mon, 4 Apr 2022 17:59:43 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4448820" author="xgen-internal-githook" created="Thu, 31 Mar 2022 20:39:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sophia Tan&apos;, &apos;email&apos;: &apos;sophia_tll@hotmail.com&apos;, &apos;username&apos;: &apos;sophiatll&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-64132&quot; title=&quot;Make shardsvrs running in serverless mode always return &amp;quot;unsharded&amp;quot; filtering metadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-64132&quot;&gt;&lt;del&gt;SERVER-64132&lt;/del&gt;&lt;/a&gt; Make shardsvrs running in serverless mode always return &quot;unsharded&quot; filtering metadata&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2f2806eb4ca08b67392b6acc5d23c16e598c5f29&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2f2806eb4ca08b67392b6acc5d23c16e598c5f29&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1993448">SERVER-64133</issuekey>
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