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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-4468] mongod in STARTUP2 can participate in elections</title>
                <link>https://jira.mongodb.org/browse/DOCS-4468</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Regarding:&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/reference/replica-states/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/replica-states/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;TL;DR: mongod members in STARTUP2 can participate in elections soon after state transition.&lt;/p&gt;

&lt;p&gt;During the course of an initial sync, mongod is in a state of STARTUP2 for the duration. While it is true that at the time we transition to STARTUP2 mongod can&apos;t vote (as RS threads have not been started), we start the RS threads  immediately after the transition (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r2.6.5/src/mongo/db/repl/rs.cpp#L556&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r2.6.5/src/mongo/db/repl/rs.cpp#L556&lt;/a&gt;) and are eligible to participate and receive elect commands.&lt;br/&gt;
Our gate check code when we receive an elect command (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r2.6.5/src/mongo/db/repl/consensus.cpp#L223&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r2.6.5/src/mongo/db/repl/consensus.cpp#L223&lt;/a&gt;) has no logic to prevent voting in STARTUP2 and only blocks participation for invalid replset name or if our rs config is stale.&lt;/p&gt;

&lt;p&gt;All of this makes sense as is beneficial for an initial-syncing node to vote in elections. This allows mongod to maintain primary, even in the case where a majority of members are performing an initial sync. &lt;/p&gt;</description>
                <environment></environment>
        <key id="172684">DOCS-4468</key>
            <summary>mongod in STARTUP2 can participate in elections</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="james.wahlin@mongodb.com">James Wahlin</reporter>
                        <labels>
                    </labels>
                <created>Thu, 4 Dec 2014 14:01:55 +0000</created>
                <updated>Thu, 16 Nov 2017 04:22:49 +0000</updated>
                            <resolved>Mon, 8 Dec 2014 22:06:56 +0000</resolved>
                                                    <fixVersion>v1.3.15</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="781217" author="xgen-internal-githook" created="Mon, 8 Dec 2014 21:41:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4468&quot; title=&quot;mongod in STARTUP2 can participate in elections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4468&quot;&gt;&lt;del&gt;DOCS-4468&lt;/del&gt;&lt;/a&gt; rewrite replica set state docs for 2.6&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/0cf9836f9816338c56071a7d1753ec3006745497&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/0cf9836f9816338c56071a7d1753ec3006745497&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="778329" author="milkie" created="Thu, 4 Dec 2014 15:02:14 +0000"  >&lt;p&gt;This page actually needs a few more corrections, for the 2.8 manual.  I will put up a CR for it.&lt;/p&gt;</comment>
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