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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-551] resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down</title>
                <link>https://jira.mongodb.org/browse/DOCS-551</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;&quot;Once you add the removed hosts back into the set, they will will detect that they have been added and synchronize to the current state of the set. Be aware that if the original master was one of the removed nodes, these members may need to rollback.&quot;&lt;/p&gt;

&lt;p&gt;I was informed that a full resync from the new primary is necessary to prevent data corruption.  The secondaries may not correctly enter into a rollback state. &lt;/p&gt;

&lt;p&gt;I think that the &quot;break the mirror&quot; technique (described for versions &amp;lt; 2.0) still applies in V2.0 and beyond. &lt;/p&gt;

&lt;p&gt;&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;</description>
                <environment></environment>
        <key id="51404">DOCS-551</key>
            <summary>resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="9">Done</resolution>
                                        <assignee username="bgrabar">Bob Grabar</assignee>
                                    <reporter username="jenna">Jenna deBoisblanc</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Sep 2012 17:29:50 +0000</created>
                <updated>Mon, 30 Oct 2023 22:01:39 +0000</updated>
                            <resolved>Thu, 27 Sep 2012 22:02:52 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="170118" author="auto" created="Mon, 1 Oct 2012 21:43:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-10-01T14:32:13-07:00&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: edits: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt; reconfig when members are down&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/5fceaf5946060b31cbab92d88650dffa487ae18d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/5fceaf5946060b31cbab92d88650dffa487ae18d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="170116" author="auto" created="Mon, 1 Oct 2012 21:42:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-09-28T16:02:48-07:00&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: merge: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/814530f8937cc2d4bb0c45d10ab3f10aa4cc5a29&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/814530f8937cc2d4bb0c45d10ab3f10aa4cc5a29&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="170114" author="auto" created="Mon, 1 Oct 2012 21:42:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-09-27T14:59:48-07:00&apos;, u&apos;email&apos;: u&apos;bob.grabar@10gen.com&apos;, u&apos;name&apos;: u&apos;Bob Grabar&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; &amp;amp; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt; reconfig repl set when members down: final&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/27a7b3c3ef774a364bd7c2728eea841955b82fe8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/27a7b3c3ef774a364bd7c2728eea841955b82fe8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="170112" author="auto" created="Mon, 1 Oct 2012 21:42:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-09-27T14:42:20-07:00&apos;, u&apos;email&apos;: u&apos;bob.grabar@10gen.com&apos;, u&apos;name&apos;: u&apos;Bob Grabar&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; &amp;amp; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt; reconfig repl set when members down: draft 4&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/31c76346910ba5f657f7c5a09225e68094464dab&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/31c76346910ba5f657f7c5a09225e68094464dab&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="170110" author="auto" created="Mon, 1 Oct 2012 21:42:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-09-27T14:15:45-07:00&apos;, u&apos;email&apos;: u&apos;bob.grabar@10gen.com&apos;, u&apos;name&apos;: u&apos;Bob Grabar&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; &amp;amp; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt; reconfig repl set when members down: draft 3&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/ec6b2d35b985b1e0c664605d9a63b28e51a29d7a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/ec6b2d35b985b1e0c664605d9a63b28e51a29d7a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="170108" author="auto" created="Mon, 1 Oct 2012 21:42:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-09-27T12:53:19-07:00&apos;, u&apos;email&apos;: u&apos;bob.grabar@10gen.com&apos;, u&apos;name&apos;: u&apos;Bob Grabar&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; &amp;amp; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt; reconfig repl set when members down: draft 2&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/bd42f6aa1715d9594230006a556166cc6291b182&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/bd42f6aa1715d9594230006a556166cc6291b182&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="170106" author="auto" created="Mon, 1 Oct 2012 21:42:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-09-27T11:24:18-07:00&apos;, u&apos;email&apos;: u&apos;bob.grabar@10gen.com&apos;, u&apos;name&apos;: u&apos;Bob Grabar&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; title=&quot;Migrate Reconfiguring a replica set when members are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-561&quot;&gt;&lt;del&gt;DOCS-561&lt;/del&gt;&lt;/a&gt; &amp;amp; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-551&quot; title=&quot;resync secondaries from scratch after forcing a node to become primary when a majority of nodes is down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-551&quot;&gt;&lt;del&gt;DOCS-551&lt;/del&gt;&lt;/a&gt; reconfig repl set when members down: draft 1&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/f6519844ce7efcb56f8e72e56818ef4bd4aa48e0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/f6519844ce7efcb56f8e72e56818ef4bd4aa48e0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="168792" author="bgrabar" created="Thu, 27 Sep 2012 16:18:06 +0000"  >&lt;p&gt;Related ticket: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-561&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/DOCS-561&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="168726" author="bgrabar" created="Thu, 27 Sep 2012 14:47:38 +0000"  >&lt;p&gt;I&apos;m checking on whether the &quot;break the mirror&quot; technique still applies.&lt;/p&gt;</comment>
                    </comments>
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