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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-10359] rs.printSlaveReplicationInfo() may show negative values if executed from a secondary</title>
                <link>https://jira.mongodb.org/browse/DOCS-10359</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;There are expected situations where &lt;tt&gt;rs.printSlaveReplicationInfo()&lt;/tt&gt; may return negative values. For example, consider a sequence is something like this:&lt;br/&gt;
12:00:00.00 Primary writes a no-op&lt;br/&gt;
12:01:00.00 Heartbeat updates secondary&apos;s view of primary &amp;#8211; every 2s, I won&apos;t list them all&lt;br/&gt;
12:00:00.10 Secondary replicates no-op (nice fast system)&lt;br/&gt;
12:05:00.00 Primary takes a real write&lt;br/&gt;
12:05:00.10 Secondary replicates real write&lt;br/&gt;
12:10:00.00 Nothing, no-op is skipped&lt;br/&gt;
12:19:00.00 Heartbeat, secondary sees primary op time of 12:05:00&lt;br/&gt;
12:20:00.00 Primary writes a no-op&lt;br/&gt;
12:20:00.10 Secondary replicates no-op&lt;br/&gt;
&amp;#8212; any replication status in here will get a -15s lag &amp;#8212;&lt;br/&gt;
12:21:00.00 Heartbeat, secondary sees primary op time of 12:20:00&lt;/p&gt;

&lt;p&gt;We should clarify that the lag reported by secondaries may not be representative of the cluster health (i.e. negative values do not indicate that the secondary is ahead of the primary). Additionally, we should clarify that it&apos;s generally advisable to run &lt;tt&gt;rs.printSlaveReplicationInfo()&lt;/tt&gt; on the primary.&lt;/p&gt;</description>
                <environment>&lt;a href=&quot;https://docs.mongodb.com/manual/reference/method/rs.printSlaveReplicationInfo/&quot;&gt;https://docs.mongodb.com/manual/reference/method/rs.printSlaveReplicationInfo/&lt;/a&gt;</environment>
        <key id="390766">DOCS-10359</key>
            <summary>rs.printSlaveReplicationInfo() may show negative values if executed from a secondary</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="jeffrey.allen@mongodb.com">Jeffrey Allen</assignee>
                                    <reporter username="kelsey.schubert@mongodb.com">Kelsey Schubert</reporter>
                        <labels>
                            <label>heartbeat</label>
                            <label>replica-set</label>
                    </labels>
                <created>Tue, 6 Jun 2017 19:53:41 +0000</created>
                <updated>Mon, 30 Oct 2023 21:11:03 +0000</updated>
                            <resolved>Tue, 27 Feb 2018 20:13:10 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1823881" author="xgen-internal-githook" created="Mon, 5 Mar 2018 23:12:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;jeffrey.allen@10gen.com&apos;, &apos;name&apos;: &apos;jeff-allen-mongo&apos;, &apos;username&apos;: &apos;jeff-allen-mongo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-10359&quot; title=&quot;rs.printSlaveReplicationInfo() may show negative values if executed from a secondary&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-10359&quot;&gt;&lt;del&gt;DOCS-10359&lt;/del&gt;&lt;/a&gt; - Adding point about negative values for printSlaveReplicationInfo()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/64f7c0ed9afabd8ce94e670160801162876b78cc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/64f7c0ed9afabd8ce94e670160801162876b78cc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1817649" author="jeffrey.allen" created="Tue, 27 Feb 2018 20:13:10 +0000"  >&lt;p&gt;This is RFM: &lt;a href=&quot;https://github.com/mongodb/docs/pull/3247&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/pull/3247&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1807145" author="jeffrey.allen" created="Thu, 15 Feb 2018 18:23:35 +0000"  >&lt;p&gt;Code review: &lt;a href=&quot;https://mongodbcr.appspot.com/190170002/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/190170002/&lt;/a&gt;&lt;/p&gt;</comment>
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