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    <link>https://jira.mongodb.org</link>
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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-59330] RSM bootstrap from config server ignores the initial shard name for validation purpose</title>
                <link>https://jira.mongodb.org/browse/SERVER-59330</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We have an actual production case when the bootstrap DB got borked by obscure conditions, not excluding manual intervention. As the result the &quot;shards&quot; DB had a correct shard name, but the list of servers pointed to a completely different database&apos;s shard, not just non-existing servers.&lt;/p&gt;

&lt;p&gt;So the RSM started contacting a completely unrelated cluster that had an actual shard running at the configured address. In theory RSM should check that the shard name matches, but it doesn&apos;t. Our code has logic to compare incoming shard name with expected, but this check is not enabled during initial bootstrap. This is the bug to fix.&lt;/p&gt;

&lt;p&gt;How this happens? The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/62494948db7c6476536081f6ac40cf2d0ef223fe/src/mongo/client/streamable_replica_set_monitor.cpp#L169&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;StreamableReplicaSetMonitor constructor v4.4&lt;/a&gt; creates the _sdamConfig with seed nodes but no shard name.&lt;/p&gt;

&lt;p&gt;Next, this config is used by the state machine and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/62494948db7c6476536081f6ac40cf2d0ef223fe/src/mongo/client/sdam/topology_state_machine.cpp#L205-L206&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;TopologyStateMachine::updateRSWithoutPrimary()&lt;/a&gt; will hit the check when currentSetName is none, and will proceed with updating the topology description.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1850693">SERVER-59330</key>
            <summary>RSM bootstrap from config server ignores the initial shard name for validation purpose</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="13201">Fixed</resolution>
                                        <assignee username="andrew.shuvalov@mongodb.com">Andrew Shuvalov</assignee>
                                    <reporter username="andrew.shuvalov@mongodb.com">Andrew Shuvalov</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Thu, 12 Aug 2021 21:40:45 +0000</created>
                <updated>Sun, 29 Oct 2023 21:49:35 +0000</updated>
                            <resolved>Fri, 20 Aug 2021 13:05:00 +0000</resolved>
                                    <version>4.4.6</version>
                                    <fixVersion>4.4 Required</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4037654" author="xgen-internal-githook" created="Thu, 2 Sep 2021 19:27:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Shuvalov&apos;, &apos;email&apos;: &apos;andrew.shuvalov@mongodb.com&apos;, &apos;username&apos;: &apos;shuvalov-mdb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59462&quot; title=&quot;Investigate and fix in head if the RSM bootstrap from config server ignores the initial shard name&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59462&quot;&gt;&lt;del&gt;SERVER-59462&lt;/del&gt;&lt;/a&gt; port of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59330&quot; title=&quot;RSM bootstrap from config server ignores the initial shard name for validation purpose&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59330&quot;&gt;&lt;del&gt;SERVER-59330&lt;/del&gt;&lt;/a&gt;: fix of RSM bootstrap from config server ignores the initial shard name needed for validation purpose&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/484225589f343c91fb7b4bac87b66213976c2cb6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/484225589f343c91fb7b4bac87b66213976c2cb6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4012541" author="JIRAUSER1256988" created="Fri, 20 Aug 2021 13:05:00 +0000"  >&lt;p&gt;Added &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59462&quot; title=&quot;Investigate and fix in head if the RSM bootstrap from config server ignores the initial shard name&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59462&quot;&gt;&lt;del&gt;SERVER-59462&lt;/del&gt;&lt;/a&gt; to investigate the same problem in head.&lt;/p&gt;</comment>
                            <comment id="4010955" author="xgen-internal-githook" created="Thu, 19 Aug 2021 19:54:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Shuvalov&apos;, &apos;email&apos;: &apos;andrew.shuvalov@mongodb.com&apos;, &apos;username&apos;: &apos;shuvalov-mdb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59330&quot; title=&quot;RSM bootstrap from config server ignores the initial shard name for validation purpose&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59330&quot;&gt;&lt;del&gt;SERVER-59330&lt;/del&gt;&lt;/a&gt;: bugfix: StreamableReplicaSetMonitor constructor should bootstrap SdamConfiguration with RS name&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0c6300fedd5fa9c074fa4c97f5e4193cd7645593&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0c6300fedd5fa9c074fa4c97f5e4193cd7645593&lt;/a&gt;&lt;/p&gt;</comment>
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