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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-25677] Config server can send wrong cluster ID to shards during addShard if cluster ID ever rolls back</title>
                <link>https://jira.mongodb.org/browse/SERVER-25677</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The first time a config server becomes primary it builds the necessary indexes on the config database and initializes the config.version collection, which includes the cluster ID.  It then immediately &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/repl/replication_coordinator_external_state_impl.cpp#L563&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;loads the cluster ID into memory&lt;/a&gt;.  If the config.version document rolls back, however, we don&apos;t clear the cached in-memory cluster ID, so when a new config.version document is written, with a new cluster ID, we won&apos;t ever realize that its changed.  This means that when we add a shard, we&apos;ll provide it the wrong clusterID in its shardIdentity document.&lt;/p&gt;</description>
                <environment></environment>
        <key id="309880">SERVER-25677</key>
            <summary>Config server can send wrong cluster ID to shards during addShard if cluster ID ever rolls back</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Aug 2016 22:58:34 +0000</created>
                <updated>Wed, 25 Jan 2017 21:58:11 +0000</updated>
                            <resolved>Fri, 26 Aug 2016 20:56:30 +0000</resolved>
                                                    <fixVersion>3.3.12</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1369526" author="xgen-internal-githook" created="Fri, 26 Aug 2016 20:55:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;stbrody&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;, u&apos;email&apos;: u&apos;spencer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25677&quot; title=&quot;Config server can send wrong cluster ID to shards during addShard if cluster ID ever rolls back&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25677&quot;&gt;&lt;del&gt;SERVER-25677&lt;/del&gt;&lt;/a&gt; Clear cached clusterId if config.version document is rolled back.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6bf9fd2e5a5f043b950cb77361be3c1ed7a7d0af&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6bf9fd2e5a5f043b950cb77361be3c1ed7a7d0af&lt;/a&gt;&lt;/p&gt;</comment>
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