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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-32604] prevent adding a binary last-stable shard if the cluster is upgrading or downgrading</title>
                <link>https://jira.mongodb.org/browse/SERVER-32604</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;b&gt;This only needs to go into v3.6, because v3.8 will remove the addShard FCV &amp;amp; WireVersion check courtesy of changes to be done in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32519&quot; title=&quot;Add a new wire version for v3.8&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32519&quot;&gt;&lt;del&gt;SERVER-32519&lt;/del&gt;&lt;/a&gt;&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;We bump the wire version (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/63f957d5a91d47bf42d4a9f2e5d89d38599ec1da/src/mongo/db/commands/feature_compatibility_version.cpp#L405-L419&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) if we&apos;re fully upgraded, upgrading or downgrading. However, in addShard (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/63f957d5a91d47bf42d4a9f2e5d89d38599ec1da/src/mongo/s/catalog/sharding_catalog_manager_shard_operations.cpp#L343-L348&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) we only prevent adding the shard if we&apos;re fully upgraded.&lt;/p&gt;

&lt;p&gt;So, currently, if we&apos;re in the process of upgrading, we&apos;ll allow an old binary version shard to be added, and then we&apos;ll presumable finish upgrading and no server will talk to it ever again.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="480704">SERVER-32604</key>
            <summary>prevent adding a binary last-stable shard if the cluster is upgrading or downgrading</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="esha.maharishi@mongodb.com">Esha Maharishi</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Tue, 9 Jan 2018 20:39:28 +0000</created>
                <updated>Mon, 30 Oct 2023 23:09:28 +0000</updated>
                            <resolved>Fri, 23 Feb 2018 16:10:22 +0000</resolved>
                                                    <fixVersion>3.6.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1814374" author="esha.maharishi@10gen.com" created="Fri, 23 Feb 2018 16:38:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=dianna.hohensee&quot; class=&quot;user-hover&quot; rel=&quot;dianna.hohensee&quot;&gt;dianna.hohensee&lt;/a&gt; sure, I filed &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33465&quot; title=&quot;forward-port handling upgrade/downgrade states when sending setFCV to new shard in addShard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33465&quot;&gt;&lt;del&gt;SERVER-33465&lt;/del&gt;&lt;/a&gt;. Can you review it?&lt;/p&gt;</comment>
                            <comment id="1814361" author="dianna.hohensee" created="Fri, 23 Feb 2018 16:31:38 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=esha.maharishi&quot; class=&quot;user-hover&quot; rel=&quot;esha.maharishi&quot;&gt;esha.maharishi&lt;/a&gt;, do we want the setFCV change part, to distinguish upgrading/downgrading, in v4.0 as well?&lt;/p&gt;</comment>
                            <comment id="1814316" author="xgen-internal-githook" created="Fri, 23 Feb 2018 16:10:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;esha.maharishi@mongodb.com&apos;, &apos;name&apos;: &apos;Esha Maharishi&apos;, &apos;username&apos;: &apos;EshaMaharishi&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32604&quot; title=&quot;prevent adding a binary last-stable shard if the cluster is upgrading or downgrading&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32604&quot;&gt;&lt;del&gt;SERVER-32604&lt;/del&gt;&lt;/a&gt; prevent adding a binary last-stable shard if the cluster is upgrading or downgrading&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e1cc0fb45f6b5bbe596158258122d188667a43fe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e1cc0fb45f6b5bbe596158258122d188667a43fe&lt;/a&gt;&lt;/p&gt;</comment>
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