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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-16569] do not update the replication progress map when receiving a heartbeat from primary</title>
                <link>https://jira.mongodb.org/browse/SERVER-16569</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://mci.10gen.com/task_history/mongodb-mongo-master/multiversion?#/w_majority_change.js=fail&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;TEST HISTORY &lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://mci.10gen.com/task/mongodb_mongo_master_amazon_a6788ec72a9dabb38bd92a8ab653e32034e9e02e_14_12_07_14_54_08_multiversion_amazon&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;EARLIEST KNOWN FAILURE &lt;/a&gt;&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; m31002| 2014-12-07T13:06:08.412-0500 [initandlisten] connection accepted from 10.168.209.60:47814 #21 (7 connections now open)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; m31002| 2014-12-07T13:06:08.412-0500 [initandlisten] connection accepted from 10.168.209.60:47813 #22 (8 connections now open)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; m31002| 2014-12-07T13:06:08.413-0500 [conn1] command write_concern_few_arbiters.$cmd command: insert { insert: &quot;foo&quot;, documents: [ { _id: ObjectId(&apos;5484970fa3cd07836941245c&apos;), x: 13.0 } ], ordered: true, writeConcern: { w: &quot;majority&quot;, wtimeout: 9000.0 } } keyUpdates:0 numYields:0 locks(micros) w:4 reslen:80 1003ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;assert: no write error: { &quot;nInserted&quot; : 1 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Error: no write error: { &quot;nInserted&quot; : 1 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    at Error (&amp;lt;anonymous&amp;gt;)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    at doassert (src/mongo/shell/assert.js:11:14)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    at Function.assert.writeError (src/mongo/shell/assert.js:421:9)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    at /data/mci/shell/src/jstests/multiVersion/w_majority_change.js:144:12&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    at /data/mci/shell/src/jstests/multiVersion/w_majority_change.js:153:2&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
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&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="174561">SERVER-16569</key>
            <summary>do not update the replication progress map when receiving a heartbeat from primary</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="ian@mongodb.com">Ian Whalen</reporter>
                        <labels>
                    </labels>
                <created>Mon, 15 Dec 2014 15:38:02 +0000</created>
                <updated>Thu, 18 Dec 2014 23:47:21 +0000</updated>
                            <resolved>Wed, 17 Dec 2014 18:45:54 +0000</resolved>
                                                    <fixVersion>2.8.0-rc3</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="788591" author="xgen-internal-githook" created="Wed, 17 Dec 2014 18:45:29 +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-16569&quot; title=&quot;do not update the replication progress map when receiving a heartbeat from primary&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16569&quot;&gt;&lt;del&gt;SERVER-16569&lt;/del&gt;&lt;/a&gt; do not update the replication progress map when receiving a heartbeat from primary&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4f329663c1908d90a73c69e8223520e5aecc8608&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4f329663c1908d90a73c69e8223520e5aecc8608&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="787411" author="mattd@10gen.com" created="Tue, 16 Dec 2014 19:19:56 +0000"  >&lt;p&gt;The trouble here is the 2.6 primary erroneously reporting a &quot;majority&quot; writeConcern as satisfied when only three of seven nodes are up (&quot;majority&quot; should need four to be satisfied).&lt;/p&gt;

&lt;p&gt;This is caused by the primary being alerted of its own replication progress. In 2.6, nodes would simply subtract one from the writeConcern quantity to account for itself. In 2.8, nodes track their own progress along side all other nodes. Additionally, in 2.8, nodes update replication progress via heartbeat as well as the replSetUpdatePosition command.&lt;/p&gt;

&lt;p&gt;So, when a 2.8 node receives a heartbeat from the 2.6 primary, the 2.8 node updates its replication progress map to reflect the primary&apos;s progress and then forwards this progress to the primary (or along a chained path where it will eventually reach the primary). When the 2.6 primary receives this progress update it sees that it has three nodes (which is majority minus one to account for itself) have replicated the op and does not know that one of those three is itself (which is now being double counted).&lt;/p&gt;

&lt;p&gt;The solution is to not update the replication progress map when receiving a heartbeat from the primary.&lt;/p&gt;</comment>
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