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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>[SERVER-18920] When adding/removing a replica set, is there a recommended procedure to ensure a primary gets elected ?</title>
                <link>https://jira.mongodb.org/browse/SERVER-18920</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I currently have a live environment of 1 primary, 1 secondary and an arbiter. I need to do some protracted maintenance so I&apos;m planning on adding another (temporary) secondary, synching up and then removing an original node to do the maintenance. When complete, the temporary box will be removed.&lt;br/&gt;
My question is about elections: when I add the temporary replica there should be an election, but at that moment I&apos;ll be transitioning from an odd to an even number of voters which should mean no primary is elected and my production database will be locked for writes. Is there a recommended process for adding and removing replicas to avoid election issues ?&lt;/p&gt;</description>
                <environment></environment>
        <key id="209991">SERVER-18920</key>
            <summary>When adding/removing a replica set, is there a recommended procedure to ensure a primary gets elected ?</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</assignee>
                                    <reporter username="kevin.doherty@feefo.com">Kevin Doherty</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 Jun 2015 13:44:20 +0000</created>
                <updated>Wed, 12 Aug 2015 21:25:36 +0000</updated>
                            <resolved>Fri, 19 Jun 2015 12:56:41 +0000</resolved>
                                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="945434" author="kevin.doherty@feefo.com" created="Fri, 19 Jun 2015 13:29:27 +0000"  >&lt;p&gt;Thanks Ramon - I wasn&apos;t aware of the Stack Overflow beastie.&lt;br/&gt;
Having read the documentation, I still think it&apos;s W-A-Y behind the product and the use cases - guess my 4 watchers think the same thing too.&lt;/p&gt;
</comment>
                            <comment id="945388" author="ramon.fernandez" created="Fri, 19 Jun 2015 12:56:32 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kevin.doherty%40feefo.com&quot; class=&quot;user-hover&quot; rel=&quot;kevin.doherty@feefo.com&quot;&gt;kevin.doherty@feefo.com&lt;/a&gt;, please review &lt;a href=&quot;http://docs.mongodb.org/manual/core/replica-set-architectures/#consider-fault-tolerance&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the documentation on fault tolerance&lt;/a&gt; for more information about this issue. You may also find useful the &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/adjust-replica-set-member-priority/#adjust-priority-for-replica-set-member&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;documentation about node priorities&lt;/a&gt; and their impact on elections.&lt;/p&gt;

&lt;p&gt;Please note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;, where your question will reach a larger audience. A question like this involving more discussion would be best posted on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt;. See also our &lt;a href=&quot;https://www.mongodb.org/about/support/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Support page&lt;/a&gt; for additional support resources.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
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