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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>[DOCS-13332] Investigate changes in SERVER-43723: FCV gating for RWCDefaults</title>
                <link>https://jira.mongodb.org/browse/DOCS-13332</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    setDefaultRWConcern can only be run when a cluster is in the fully upgraded to FCV 4.4 state.&lt;/p&gt;

&lt;p&gt;Downgrading FCV from 4.4 to 4.2 will cause any cluster wide read write concern defaults to be lost, but mongos servers may continue applying the defaults for up to 30 seconds.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    null&lt;/p&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="1080936">DOCS-13332</key>
            <summary>Investigate changes in SERVER-43723: FCV gating for RWCDefaults</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="steve.renaker@mongodb.com">Steve Renaker</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Wed, 8 Jan 2020 21:29:24 +0000</created>
                <updated>Mon, 13 Nov 2023 18:12:02 +0000</updated>
                            <resolved>Tue, 14 Jul 2020 18:24:52 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3284893" author="steve.renaker" created="Tue, 14 Jul 2020 18:24:52 +0000"  >&lt;p&gt;PR: &lt;a href=&quot;https://github.com/mongodb/docs/pull/4201&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/pull/4201&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3284890" author="xgen-internal-githook" created="Tue, 14 Jul 2020 18:23:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Steve Renaker&apos;, &apos;email&apos;: &apos;steve.renaker@10gen.com&apos;, &apos;username&apos;: &apos;steveren&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13332&quot; title=&quot;Investigate changes in SERVER-43723: FCV gating for RWCDefaults&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13332&quot;&gt;&lt;del&gt;DOCS-13332&lt;/del&gt;&lt;/a&gt;: FCV gating for RWCDefaults&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/75532c46040a146a8d2be87e126e6f9426e87e37&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/75532c46040a146a8d2be87e126e6f9426e87e37&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3284785" author="steve.renaker" created="Tue, 14 Jul 2020 17:31:22 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jack.mulrow&quot; class=&quot;user-hover&quot; rel=&quot;jack.mulrow&quot;&gt;jack.mulrow&lt;/a&gt; Can you take a look at the CR for this item when you have a chance? Thanks.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://mongodbcr.appspot.com/626910002/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/626910002/&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3134694" author="ravind.kumar" created="Thu, 28 May 2020 18:14:13 +0000"  >&lt;p&gt;Note: This was partially captured in DOCSP-7544. For example, see &lt;span class=&quot;error&quot;&gt;&amp;#91;this commit&amp;#93;&lt;/span&gt;(&lt;a href=&quot;https://github.com/mongodb/docs/commit/4ed15e0b01232b24de9878604a936cdae34a0a16#diff-5647b554183a3604f97c3ca7ca311f2fR198-R211&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/4ed15e0b01232b24de9878604a936cdae34a0a16#diff-5647b554183a3604f97c3ca7ca311f2fR198-R211&lt;/a&gt;)&lt;/p&gt;

&lt;p&gt;However, we still need to document in the Downgrade section that the default RWConcern settings are lost, &lt;b&gt;but&lt;/b&gt; &lt;tt&gt;mongos&lt;/tt&gt; routers may continue applying those defaults for up to 30 seconds after downgrading fcv. &lt;/p&gt;</comment>
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