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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-12887] Investigate changes in SERVER-41261: Use the oplog entry after the common point to calculate rollbackTimeLimitSecs</title>
                <link>https://jira.mongodb.org/browse/DOCS-12887</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

&lt;h3&gt;&lt;a name=&quot;SERVERticketdescription%3A&quot;&gt;&lt;/a&gt;SERVER ticket description: &lt;/h3&gt;

&lt;p&gt;In Atlas you can pause a cluster, effectively shutting the nodes down for a period of time.&lt;/p&gt;

&lt;p&gt;Let&apos;s assume we pause for more than 24 hours and that all the nodes are current having committed all the writes.  When they are restarted at the same time, we are seeing two nodes run and two branches of history forming. Eventually, one goes into rollback and gets a fassert because the common point is more than 24 hours behind even though we are only rolling back 1 or 2 very recent oplog entries. The common point, in this case, is from over 24 hours ago where the oplog entry immediately after the common point is from less than 5 mins ago.&lt;/p&gt;

&lt;p&gt;While we believe we are fixing the two nodes running at the same time problem via &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40336&quot; title=&quot;ReplicationCoordinatorImpl::_random isn&amp;#39;t robust to replica set members being started at the same time&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40336&quot;&gt;&lt;del&gt;SERVER-40336&lt;/del&gt;&lt;/a&gt;, it still makes sense to change this calculation if true network partitions occur after unpausing. Resolving this manually is a headache. &lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;ChangeDescription%3A&quot;&gt;&lt;/a&gt;Change Description: &lt;/h3&gt;

&lt;p&gt;The rollback time limit is no longer calculated between the top of the oplog and the common point but rather it is now  between the top of the oplog and the first operation after the common point. The time limit is still 24 hours.&lt;/p&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="855422">DOCS-12887</key>
            <summary>Investigate changes in SERVER-41261: Use the oplog entry after the common point to calculate rollbackTimeLimitSecs</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>docs-backport-done</label>
                    </labels>
                <created>Fri, 12 Jul 2019 17:16:52 +0000</created>
                <updated>Mon, 13 Nov 2023 18:18:45 +0000</updated>
                            <resolved>Tue, 20 Aug 2019 21:16:48 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                    <fixVersion>4.2.0-rc3</fixVersion>
                    <fixVersion>4.0.13</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2489266" author="xgen-internal-githook" created="Fri, 18 Oct 2019 12:57:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;kay-kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;Kay Kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12887&quot; title=&quot;Investigate changes in SERVER-41261: Use the oplog entry after the common point to calculate rollbackTimeLimitSecs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12887&quot;&gt;&lt;del&gt;DOCS-12887&lt;/del&gt;&lt;/a&gt;: 4.0.13 rollback time limit calc change&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/2aa0fc12a65786fc0a7489a7e941b20f4be04fbc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/2aa0fc12a65786fc0a7489a7e941b20f4be04fbc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2379859" author="xgen-internal-githook" created="Tue, 20 Aug 2019 21:16:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12887&quot; title=&quot;Investigate changes in SERVER-41261: Use the oplog entry after the common point to calculate rollbackTimeLimitSecs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12887&quot;&gt;&lt;del&gt;DOCS-12887&lt;/del&gt;&lt;/a&gt;: tweak rollback calc for backport to 4.0&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/6dacd0b313a12a7d489a0c9faff464ec1d765c64&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/6dacd0b313a12a7d489a0c9faff464ec1d765c64&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2379852" author="xgen-internal-githook" created="Tue, 20 Aug 2019 21:12:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12887&quot; title=&quot;Investigate changes in SERVER-41261: Use the oplog entry after the common point to calculate rollbackTimeLimitSecs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12887&quot;&gt;&lt;del&gt;DOCS-12887&lt;/del&gt;&lt;/a&gt;: 4.0.13 rollback time limit calc change&lt;br/&gt;
Branch: v4.0.13&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/949d783e420e36ec2312d3d8405b745174cc436d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/949d783e420e36ec2312d3d8405b745174cc436d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2378148" author="kay.kim@10gen.com" created="Mon, 19 Aug 2019 22:59:25 +0000"  >&lt;p&gt;reopening for backport&lt;/p&gt;</comment>
                            <comment id="2361216" author="xgen-internal-githook" created="Wed, 7 Aug 2019 14:19:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;username&apos;: &apos;kay-kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12887&quot; title=&quot;Investigate changes in SERVER-41261: Use the oplog entry after the common point to calculate rollbackTimeLimitSecs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12887&quot;&gt;&lt;del&gt;DOCS-12887&lt;/del&gt;&lt;/a&gt;: 4.2 rollback time limit calc change&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/735f74cbf1455bb616f862154440ed7162688fa3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/735f74cbf1455bb616f862154440ed7162688fa3&lt;/a&gt;&lt;/p&gt;</comment>
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