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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-2182] new feature for replica sets : fail over with minority</title>
                <link>https://jira.mongodb.org/browse/SERVER-2182</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;if a replica set is partially down, perhaps a majority down, there needs to be an easy way to cut over to the remainder of the set.  this can be done today but is administratively tedious.&lt;/p&gt;

&lt;p&gt;we could have a command for this.&lt;/p&gt;

&lt;p&gt;this requires some research and thinking first; the other part of the set may think it is still up if the network is partitioned.  this has to be handled gracefully.  &lt;/p&gt;</description>
                <environment></environment>
        <key id="13879">SERVER-2182</key>
            <summary>new feature for replica sets : fail over with minority</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="kristina">Kristina Chodorow</assignee>
                                    <reporter username="dwight@mongodb.com">Dwight Merriman</reporter>
                        <labels>
                    </labels>
                <created>Mon, 6 Dec 2010 20:09:43 +0000</created>
                <updated>Tue, 16 Nov 2021 17:32:22 +0000</updated>
                            <resolved>Thu, 16 Jun 2011 18:27:38 +0000</resolved>
                                                    <fixVersion>1.9.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>3</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="37913" author="kristina" created="Thu, 16 Jun 2011 19:51:39 +0000"  >&lt;p&gt;&amp;gt; db.adminCommand(&lt;/p&gt;
{replSetReconfig:config, force : true}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;See &lt;a href=&quot;http://www.mongodb.org/display/DOCS/Reconfiguring+a+replica+set+when+members+are+down&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/Reconfiguring+a+replica+set+when+members+are+down&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="37911" author="streetcat@gmail.com" created="Thu, 16 Jun 2011 19:13:17 +0000"  >&lt;p&gt;What&apos;s the command?&lt;/p&gt;</comment>
                            <comment id="37542" author="auto" created="Tue, 14 Jun 2011 20:23:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;kchodorow&apos;, u&apos;name&apos;: u&apos;Kristina&apos;, u&apos;email&apos;: u&apos;kristina@10gen.com&apos;}
&lt;p&gt;Message: force reconfig &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2182&quot; title=&quot;new feature for replica sets : fail over with minority&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2182&quot;&gt;&lt;del&gt;SERVER-2182&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/aa4edc53fb07a89b74977c9654b0f216b1582b07&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/aa4edc53fb07a89b74977c9654b0f216b1582b07&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="34303" author="streetcat@gmail.com" created="Wed, 25 May 2011 07:14:28 +0000"  >&lt;p&gt;Good idea guys, thanks.&lt;br/&gt;
Still a fail over with minority would make things much simpler.&lt;/p&gt;</comment>
                            <comment id="34292" author="rasitha1" created="Wed, 25 May 2011 05:41:10 +0000"  >&lt;p&gt;Having an arbiter in a third site is exactly what we are doing. Don&apos;t have to worry about manual intervention. &lt;/p&gt;</comment>
                            <comment id="34291" author="dwight_10gen" created="Wed, 25 May 2011 04:41:35 +0000"  >&lt;p&gt;I wonder if the real solution is just to have an arbiter in a third location.&lt;/p&gt;</comment>
                            <comment id="34167" author="streetcat@gmail.com" created="Tue, 24 May 2011 14:01:49 +0000"  >&lt;p&gt;The problem is not only the complexity of the procedure but also the resulting downtime.&lt;br/&gt;
There are cases when I know the majority is down because the data center they are in failed.&lt;br/&gt;
I should be able to &quot;turn off&quot; the part of the election algorithm that requires a majority.&lt;br/&gt;
In most cases this would be a temporary state, until the failing data center come back or until I add more nodes.&lt;/p&gt;</comment>
                            <comment id="21115" author="dwight_10gen" created="Mon, 6 Dec 2010 20:25:29 +0000"  >&lt;p&gt;right.  thus the jira. &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;

&lt;p&gt;several howto&apos;s here: &lt;a href=&quot;http://www.mongodb.org/display/DOCS/Replica+Sets&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/Replica+Sets&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;particularly: &lt;a href=&quot;http://www.mongodb.org/display/DOCS/Reconfiguring+a+replica+set+when+members+are+down&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/Reconfiguring+a+replica+set+when+members+are+down&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="21114" author="parkan" created="Mon, 6 Dec 2010 20:22:14 +0000"  >&lt;p&gt;Is there a FAQ entry for manual failover in this case somewhere? The procedure I had to employ was annoying to figure out and required server restarts, which makes me think it may have been less than ideal. &lt;/p&gt;</comment>
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