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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-48930] Use lastFetched from previous batch when comparing optimes for re-evaluating sync source</title>
                <link>https://jira.mongodb.org/browse/SERVER-48930</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Instead of using the latest optime for the batch that was just fetched, we should use the latest optime in the previous batch. If we find that the node wants to change sync sources, then we will abandon the batch that was just fetched and try to sync from another node.&lt;/p&gt;

&lt;p&gt;This will make it more likely for a node to switch sync sources when they are at similar optimes, because it increases the chances that the node thinks it is behind the other node. &lt;/p&gt;</description>
                <environment></environment>
        <key id="1383144">SERVER-48930</key>
            <summary>Use lastFetched from previous batch when comparing optimes for re-evaluating sync source</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="xuerui.fa@mongodb.com">Xuerui Fa</assignee>
                                    <reporter username="samy.lanka@mongodb.com">Samyukta Lanka</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Jun 2020 21:41:22 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:51 +0000</updated>
                            <resolved>Thu, 9 Jul 2020 16:50:22 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3277907" author="xgen-internal-githook" created="Thu, 9 Jul 2020 16:45:35 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;XueruiFa&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-48930&quot; title=&quot;Use lastFetched from previous batch when comparing optimes for re-evaluating sync source&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48930&quot;&gt;&lt;del&gt;SERVER-48930&lt;/del&gt;&lt;/a&gt;: Use lastFetched from previous batch when comparing optimes for re-evaluating sync source&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1b0445dc3ea2a3d15ae477238f68b0a4438a7212&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1b0445dc3ea2a3d15ae477238f68b0a4438a7212&lt;/a&gt;&lt;/p&gt;</comment>
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