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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-45082] Secondaries only learn configs with higher (term, version) pair</title>
                <link>https://jira.mongodb.org/browse/SERVER-45082</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Secondaries only learn a new config via heartbeats if the new config has a higher (term, version) pair than the node&#8217;s current config.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1049551">SERVER-45082</key>
            <summary>Secondaries only learn configs with higher (term, version) pair</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="13201">Fixed</resolution>
                                        <assignee username="william.schultz@mongodb.com">William Schultz</assignee>
                                    <reporter username="siyuan.zhou@mongodb.com">Siyuan Zhou</reporter>
                        <labels>
                            <label>safe-reconfig-consensus</label>
                    </labels>
                <created>Thu, 12 Dec 2019 05:30:25 +0000</created>
                <updated>Sun, 29 Oct 2023 22:14:10 +0000</updated>
                            <resolved>Mon, 10 Feb 2020 21:09:44 +0000</resolved>
                                                    <fixVersion>4.3.4</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2859433" author="xgen-internal-githook" created="Mon, 10 Feb 2020 20:52:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;will62794&apos;, &apos;name&apos;: &apos;William Schultz&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45082&quot; title=&quot;Secondaries only learn configs with higher (term, version) pair&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45082&quot;&gt;&lt;del&gt;SERVER-45082&lt;/del&gt;&lt;/a&gt; Utilize ConfigVersionAndTerm structure for comparison and string formatting&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d80b24a633107f81fcdd2cb7cf9ce0dec89802a1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d80b24a633107f81fcdd2cb7cf9ce0dec89802a1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2812085" author="william.schultz" created="Thu, 6 Feb 2020 16:54:53 +0000"  >&lt;p&gt;As a part of these changes, we decided to omit the &quot;configTerm&quot; field on all heartbeat requests sent by arbiters. This is to prevent 4.2 nodes from failing to parse these requests in a mixed version set, since arbiters don&apos;t respect FCV changes. This should be safe since the fields in a heartbeat requests only affect whether a node is going to immediately fetch a new config from the sender. It shouldn&apos;t affect the safety of the protocol. In certain cases, since omission of a configTerm in 4.4 is treated as a default of -1, it may prevent a node from fetching a newer config immediately, or cause a node to fetch a config that isn&apos;t actually newer. In either case, though, the node should never actually install a config that isn&apos;t newer, which is the necessary safety requirement.&lt;/p&gt;</comment>
                            <comment id="2796561" author="xgen-internal-githook" created="Thu, 6 Feb 2020 04:23:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;William Schultz&apos;, &apos;username&apos;: &apos;will62794&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45082&quot; title=&quot;Secondaries only learn configs with higher (term, version) pair&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45082&quot;&gt;&lt;del&gt;SERVER-45082&lt;/del&gt;&lt;/a&gt; Secondaries only learn replica set configs with a newer (version, term) pair&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/36f668e510c99b47620c1985e65c72a106fadbbe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/36f668e510c99b47620c1985e65c72a106fadbbe&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2783740" author="xgen-internal-githook" created="Tue, 4 Feb 2020 21:49:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;William Schultz&apos;, &apos;username&apos;: &apos;will62794&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45082&quot; title=&quot;Secondaries only learn configs with higher (term, version) pair&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45082&quot;&gt;&lt;del&gt;SERVER-45082&lt;/del&gt;&lt;/a&gt; Add ConfigVersionAndTerm structure for comparing replica set configs&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7fa0a642fa7e99740b83e61040b01498dfb889eb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7fa0a642fa7e99740b83e61040b01498dfb889eb&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1305412">SERVER-47348</issuekey>
        </issuelink>
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