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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-47451] Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set</title>
                <link>https://jira.mongodb.org/browse/SERVER-47451</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Similar to how we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/90e56683e8d9c24f155ffbb64bb13b4169c924e8/src/mongo/db/repl/topology_coordinator.cpp#L494-L495&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;wait for enough ping stats when choosing a sync source&lt;/a&gt;, we should wait for enough ping stats before re-evaluating our sync source.&lt;/p&gt;

&lt;p&gt;We should wait for 5N pings (where N is the number of members in the replica set not counting ourselves) before re-evaluating our sync source to avoid unnecessary ping time fluctuation, since that is (approximately) the point at which all ping times will be weighted the same &lt;a href=&quot;https://github.com/mongodb/mongo/blob/90e56683e8d9c24f155ffbb64bb13b4169c924e8/src/mongo/db/repl/topology_coordinator.cpp#L156-L159&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;in the rolling average&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1310310">SERVER-47451</key>
            <summary>Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set</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="xuerui.fa@mongodb.com">Xuerui Fa</assignee>
                                    <reporter username="samy.lanka@mongodb.com">Samyukta Lanka</reporter>
                        <labels>
                    </labels>
                <created>Fri, 10 Apr 2020 00:00:22 +0000</created>
                <updated>Sun, 29 Oct 2023 22:09:42 +0000</updated>
                            <resolved>Thu, 21 May 2020 16:03:19 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3102561" author="xgen-internal-githook" created="Thu, 21 May 2020 16:28:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Xuerui Fa&apos;, &apos;email&apos;: &apos;xuerui.fa@mongodb.com&apos;, &apos;username&apos;: &apos;XueruiFa&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47451&quot; title=&quot;Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47451&quot;&gt;&lt;del&gt;SERVER-47451&lt;/del&gt;&lt;/a&gt;: Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/300d06e03402aae1240bad4582ad30ea4917e35f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/300d06e03402aae1240bad4582ad30ea4917e35f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3098617" author="xgen-internal-githook" created="Thu, 21 May 2020 00:36:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Xuerui Fa&apos;, &apos;email&apos;: &apos;xuerui.fa@mongodb.com&apos;, &apos;username&apos;: &apos;XueruiFa&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47451&quot; title=&quot;Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47451&quot;&gt;&lt;del&gt;SERVER-47451&lt;/del&gt;&lt;/a&gt;: Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 6696c3edd281bd4f0eea7d5439902eb460128890.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/960e0ee34d6f6f1cc4171f739c5a3bbff105931a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/960e0ee34d6f6f1cc4171f739c5a3bbff105931a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3098539" author="xgen-internal-githook" created="Wed, 20 May 2020 23:05:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Xuerui Fa&apos;, &apos;email&apos;: &apos;xuerui.fa@mongodb.com&apos;, &apos;username&apos;: &apos;XueruiFa&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47451&quot; title=&quot;Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47451&quot;&gt;&lt;del&gt;SERVER-47451&lt;/del&gt;&lt;/a&gt;: Skip re-evaluating sync source if node does not have enough ping stats from other nodes in replica set&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6696c3edd281bd4f0eea7d5439902eb460128890&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6696c3edd281bd4f0eea7d5439902eb460128890&lt;/a&gt;&lt;/p&gt;</comment>
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