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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-14308] replace replsets/majority.js with c++ unit tests covering the same functionality</title>
                <link>https://jira.mongodb.org/browse/SERVER-14308</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;majority.js has been flaky since we removed the ability to have zero vote arbiters. The test cannot really be fixed, but equivalent testing can be done in other places. &lt;/p&gt;</description>
                <environment></environment>
        <key id="143027">SERVER-14308</key>
            <summary>replace replsets/majority.js with c++ unit tests covering the same functionality</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="matt.dannenberg">Matt Dannenberg</assignee>
                                    <reporter username="matt.dannenberg">Matt Dannenberg</reporter>
                        <labels>
                    </labels>
                <created>Thu, 19 Jun 2014 14:59:31 +0000</created>
                <updated>Mon, 11 Jul 2016 17:16:12 +0000</updated>
                            <resolved>Mon, 20 Oct 2014 22:55:25 +0000</resolved>
                                    <version>2.7.2</version>
                                    <fixVersion>2.7.8</fixVersion>
                                    <component>Replication</component>
                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="737007" author="milkie" created="Wed, 8 Oct 2014 21:02:10 +0000"  >&lt;p&gt;I see.&lt;br/&gt;
As long as you believe we already have sufficient coverage for testing the majority calculation in the new system, there is nothing further to do for this ticket.&lt;/p&gt;</comment>
                            <comment id="736892" author="mattd@10gen.com" created="Wed, 8 Oct 2014 19:31:29 +0000"  >&lt;p&gt;The flapping occurred three and a half months ago and we fixed it by deleting the test... If I recall correctly, once we&apos;d removed support for non-voting arbiters, the primary would stepdown when the test didn&apos;t expect it to. So the flapping was a race between the primary stepping down because it couldn&apos;t see a majority of nodes and the actual functionality of the test (inserts with write concerns).&lt;/p&gt;</comment>
                            <comment id="736866" author="milkie" created="Wed, 8 Oct 2014 19:10:31 +0000"  >&lt;p&gt;I understand that the definition is wrong, but I don&apos;t understand why the test doesn&apos;t fail all the time then.  Which part of the test mechanics is causing flapping?&lt;/p&gt;</comment>
                            <comment id="734510" author="mattd@10gen.com" created="Mon, 6 Oct 2014 13:56:50 +0000"  >&lt;p&gt;I took a look at majority.js again and I believe it is testing the flawed definition of majority, which we intend to correct for 2.8. The test starts with a seven node set containing four arbiters and ensure that taking all the arbiters offline does not prevent &quot;majority&quot; write concern. Then, it then removes two arbiter nodes from the set and confirms that all three non-arbiter nodes are still needed for write concern &quot;majority&quot;. It then network partitions one of the three non-arbiter votes from the other two and ensures write concern cannot be satisfied until they are rejoined. All of this depends on an incorrect definition of majority.&lt;/p&gt;</comment>
                            <comment id="628274" author="xgen-internal-githook" created="Thu, 19 Jun 2014 22:45:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dannenberg&apos;, u&apos;name&apos;: u&apos;matt dannenberg&apos;, u&apos;email&apos;: u&apos;matt.dannenberg@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-14308&quot; title=&quot;replace replsets/majority.js with c++ unit tests covering the same functionality&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-14308&quot;&gt;&lt;del&gt;SERVER-14308&lt;/del&gt;&lt;/a&gt; eliminate majority.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4fc19b1e98165ee1518c568a6ab9d5a1fece8db4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4fc19b1e98165ee1518c568a6ab9d5a1fece8db4&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="144839">SERVER-14403</issuekey>
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