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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-27672] Unnecessary rollback for a hidden node after a priority takeover reconfig</title>
                <link>https://jira.mongodb.org/browse/SERVER-27672</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi, I have a P/S/H(priority 2/1/0) replset using 3.2.9 with replicaton protocal v1. And I noticed that during a reconfiging to (1/2/0) procedure, the Hidden node entered rollback state because he choosed the original Primary as his new sync source after the new election, which soon rollbacked too because he is no longer the Primary.  This Hidden entered rollback because he has a higer term(the latest right term synced from the new Primary) than the sync source(the original Primary). But I think this rollback is unnecessary. Is this a sync source choosen bug?  I have all the 3 nodes&apos; mongod.log if you need. Thanks!&lt;/p&gt;</description>
                <environment></environment>
        <key id="345299">SERVER-27672</key>
            <summary>Unnecessary rollback for a hidden node after a priority takeover reconfig</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="kelsey.schubert@mongodb.com">Kelsey Schubert</assignee>
                                    <reporter username="zhcn381">CenZheng</reporter>
                        <labels>
                    </labels>
                <created>Fri, 13 Jan 2017 08:45:15 +0000</created>
                <updated>Mon, 23 Jan 2017 19:37:38 +0000</updated>
                            <resolved>Mon, 23 Jan 2017 19:37:38 +0000</resolved>
                                    <version>3.2.9</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1482967" author="thomas.schubert" created="Mon, 23 Jan 2017 19:37:29 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=zhcn381&quot; class=&quot;user-hover&quot; rel=&quot;zhcn381&quot;&gt;zhcn381&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for providing the logs. After review, appears that you are hitting &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27403&quot; title=&quot;Consider term and rbid when validating the proposed sync source&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27403&quot;&gt;&lt;del&gt;SERVER-27403&lt;/del&gt;&lt;/a&gt;. Please note that we have made a number of improvements in MongoDB 3.4 to reduce the frequency of rollbacks in replica sets with various priority levels. If this is an issue for you, I would recommend that you consider upgrading to MongoDB 3.4 as well as watching &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27403&quot; title=&quot;Consider term and rbid when validating the proposed sync source&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27403&quot;&gt;&lt;del&gt;SERVER-27403&lt;/del&gt;&lt;/a&gt; for updates.&lt;/p&gt;

&lt;p&gt;King regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1477181" author="zhcn381" created="Mon, 16 Jan 2017 01:59:00 +0000"  >&lt;p&gt;Hi Thomas,&lt;br/&gt;
I have uploaded the replication related log in the attachments here. Thanks~&lt;/p&gt;</comment>
                            <comment id="1476672" author="thomas.schubert" created="Fri, 13 Jan 2017 20:22:24 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=zhcn381&quot; class=&quot;user-hover&quot; rel=&quot;zhcn381&quot;&gt;zhcn381&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for reporting this behavior. So we can investigate, would you please upload the logs for all three nodes to this &lt;a href=&quot;https://10gen-httpsupload.s3.amazonaws.com/upload_forms/61215000-169a-45d0-b5b6-cdc24618c76d.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;secure portal&lt;/a&gt;?&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
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                            <attachment id="147632" name="repl_log.tar.gz" size="6076" author="zhcn381" created="Mon, 16 Jan 2017 01:57:40 +0000"/>
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