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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-49006] Only advance oldest timestamp when setting lastApplied during initial sync instead of STARTUP2 state</title>
                <link>https://jira.mongodb.org/browse/SERVER-49006</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b2f840c9efca29820fb48a89741fa18ace8a33b1/src/mongo/db/repl/replication_coordinator_impl.cpp#L1441-L1444&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;advance our oldest timestamp&lt;/a&gt; to lastApplied whenever we are in STARTUP2 state. This was originally intended to relieve cache pressure during initial sync oplog application, as described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32226&quot; title=&quot;oldest_timestamp should track the last applied time, during initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32226&quot;&gt;&lt;del&gt;SERVER-32226&lt;/del&gt;&lt;/a&gt;. The current logic, however, is not strictly scoped to initial sync oplog application, since we pass through STARTUP2 whenever we start up and go through recovery on our way to SECONDARY. This means that, after a normal startup recovery procedure, we will set our lastApplied and oldest timestamp to the top of the oplog when we load our optimes from disk &lt;a href=&quot;https://github.com/mongodb/mongo/blob/af4a4399ded235a268c631c59a231e8210e40192/src/mongo/db/repl/replication_coordinator_impl.cpp#L538&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. This can lead to a case where we become SECONDARY and our oldest timestamp is ahead of our initialDataTimestamp before we have set a stable timestamp. Due to the changes in&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47844&quot; title=&quot;Update _setStableTimestampForStorage to set the stable timestamp without using the stable optime candidates set when EMRC=true&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47844&quot;&gt;&lt;del&gt;SERVER-47844&lt;/del&gt;&lt;/a&gt;, this can cause an issue where we try to set our first stable timestamp behind the oldest timestamp, since we use the initialDataTimestamp as a barrier behind which we will not set the stable timestamp. To avoid this problem, we should move &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b2f840c9efca29820fb48a89741fa18ace8a33b1/src/mongo/db/repl/replication_coordinator_impl.cpp#L1441-L1444&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this logic&lt;/a&gt; into the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b2f840c9efca29820fb48a89741fa18ace8a33b1/src/mongo/db/repl/replication_coordinator_impl.cpp#L297-L302&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;setMyLastOpTime callback&lt;/a&gt; which is the specific location where we advance lastApplied during initial sync oplog application.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1385932">SERVER-49006</key>
            <summary>Only advance oldest timestamp when setting lastApplied during initial sync instead of STARTUP2 state</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="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                    </labels>
                <created>Mon, 22 Jun 2020 16:25:54 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:42 +0000</updated>
                            <resolved>Thu, 25 Jun 2020 01:59:26 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3223152" author="xgen-internal-githook" created="Thu, 25 Jun 2020 01:48:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;William Schultz&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;, &apos;username&apos;: &apos;will62794&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49006&quot; title=&quot;Only advance oldest timestamp when setting lastApplied during initial sync instead of STARTUP2 state&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49006&quot;&gt;&lt;del&gt;SERVER-49006&lt;/del&gt;&lt;/a&gt; Move initial sync oldest_timestamp advancement directly into initial sync oplog application callback&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6225672cf987f7dc72f7c2e94ee0044262110e6c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6225672cf987f7dc72f7c2e94ee0044262110e6c&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1333345">SERVER-47844</issuekey>
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            <issuekey id="469944">SERVER-32226</issuekey>
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