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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-35835] Allow quicker sync source change when a new Primary is elected</title>
                <link>https://jira.mongodb.org/browse/SERVER-35835</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It has been observed that with chained replication disabled when the current primary becomes unresponsive and the secondaries elect a new primary, they keep syncing to the original primary for a notable amount of time instead of switching to the new one as soon as it is transitioned into PRIMARY. It causes the following issues:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The new primary will fail to acknowledge w:2+ writes since there are no secondaries syncing from it, effectively making the outage longer&lt;/li&gt;
	&lt;li&gt;If the original primary gets unblocked, there is likely to be a rollback not only on that primary but also on the secondaries.&lt;/li&gt;
	&lt;li&gt;The rollback can happen on a majority of the replica set members&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I would be better if the secondaries could re-evaluate their sync source immediately after the new primary becomes available for writes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="564607">SERVER-35835</key>
            <summary>Allow quicker sync source change when a new Primary is elected</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="3">Duplicate</resolution>
                                        <assignee username="tess.avitabile@mongodb.com">Tess Avitabile</assignee>
                                    <reporter username="dmitry.ryabtsev@mongodb.com">Dmitry Ryabtsev</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 Jun 2018 02:06:01 +0000</created>
                <updated>Thu, 26 Jul 2018 18:22:19 +0000</updated>
                            <resolved>Fri, 6 Jul 2018 18:51:32 +0000</resolved>
                                    <version>3.4.14</version>
                                                    <component>Replication</component>
                                        <votes>1</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="1934314" author="spencer" created="Thu, 28 Jun 2018 21:03:26 +0000"  >&lt;p&gt;An acknowledged write could only roll back if the write concern was less than w:majority, regardless of wtimeout.  A write that was successfully acknowledged with w:majority write concern must never roll back.&lt;/p&gt;</comment>
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