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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-14392] Replica set step down behaviour for data not replicated.</title>
                <link>https://jira.mongodb.org/browse/SERVER-14392</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I have a question about step down.  The release notes for mongo 2.0 (we are running 2.4.6) state,&lt;/p&gt;

&lt;p&gt;&#8216;To minimize time without a primary, the rs.stepDown() method will now fail if the primary does not see asecondary within 10 seconds of its latest optime. You can force the primary to step down anyway, but by default it will return an error message.&#8217;  (&lt;a href=&quot;http://docs.mongodb.org/manual/release-notes/2.0/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/release-notes/2.0/&lt;/a&gt;)&lt;/p&gt;

&lt;p&gt;Lets take the following example;&lt;/p&gt;

&lt;p&gt;There are 2 data nodes, nodeA &amp;amp; nodeB, nodeA is the primary, nodeB is the secondary and is 9 seconds behind.  The replica set is told to step down, nodeA becomes secondary, and nodeB elects itself as primary.&lt;/p&gt;

&lt;p&gt;What I am interested in is, what happens to the 9 seconds worth of data that the primary had when it was in front and told to step down?  Is that data &apos;lost&apos; in a rollback, ie. &lt;a href=&quot;http://docs.mongodb.org/manual/core/replica-set-rollbacks/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/core/replica-set-rollbacks/&lt;/a&gt; ??&lt;/p&gt;


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                <environment></environment>
        <key id="144601">SERVER-14392</key>
            <summary>Replica set step down behaviour for data not replicated.</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="-1">Unassigned</assignee>
                                    <reporter username="sj">simon</reporter>
                        <labels>
                    </labels>
                <created>Mon, 30 Jun 2014 14:25:02 +0000</created>
                <updated>Wed, 10 Dec 2014 23:10:36 +0000</updated>
                            <resolved>Tue, 1 Jul 2014 18:29:58 +0000</resolved>
                                    <version>2.4.6</version>
                    <version>2.6.3</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="640884" author="thomasr" created="Tue, 1 Jul 2014 18:29:58 +0000"  >&lt;p&gt;Hi Simon,&lt;/p&gt;

&lt;p&gt;The SERVER project is for reporting bugs or feature suggestions for the MongoDB server.&lt;/p&gt;

&lt;p&gt;For MongoDB-related support discussion please post on the mongodb-users group (&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;http://groups.google.com/group/mongodb-user&lt;/a&gt;) or Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag. A question like this involving more discussion would be best posted on the mongodb-users group.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
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