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    <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-27967] Choose whether to do oplog catch up based on local last fetched optime rather than last applied optime</title>
                <link>https://jira.mongodb.org/browse/SERVER-27967</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a node decides if it&apos;s up to date, it compares the highest last applied optime of other nodes to it&apos;s own last applied optime: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.2/src/mongo/db/repl/replication_coordinator_impl.cpp#L2781-L2788&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.4.2/src/mongo/db/repl/replication_coordinator_impl.cpp#L2781-L2788&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;We could go into drain mode faster and skip catch up more often if nodes compared the highest last applied optime of other nodes to their own last fetched optime instead.&lt;/p&gt;</description>
                <environment></environment>
        <key id="353117">SERVER-27967</key>
            <summary>Choose whether to do oplog catch up based on local last fetched optime rather than last applied optime</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="judah.schvimer@mongodb.com">Judah Schvimer</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Feb 2017 21:44:57 +0000</created>
                <updated>Mon, 13 Feb 2017 21:48:35 +0000</updated>
                            <resolved>Mon, 13 Feb 2017 21:48:35 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1498171" author="judah.schvimer" created="Mon, 13 Feb 2017 21:48:18 +0000"  >&lt;p&gt;While this would be more true to what we actually need to do for catchup, there&apos;s no negative to going into catchup when we do not need to. We will simply spend less time in drain mode and more time in catchup mode, but those will balance out. We also do not have the last fetched OpTime available so this would not be a simple fix. Closing as &quot;Won&apos;t Fix&quot;.&lt;/p&gt;</comment>
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