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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-46850] Stepup due to election handoff may not have _voteRequester when it&apos;s candidate</title>
                <link>https://jira.mongodb.org/browse/SERVER-46850</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;ReplicationCoordinatorImpl::_cancelElectionIfNeeded_inlock() &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5eeb0955011cf96d0218ac0a9d7f54adc9584173/src/mongo/db/repl/replication_coordinator_impl.cpp#L5026&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;assumes a candidate always has a _voteRequester&lt;/a&gt;, which isn&apos;t true for stepup command that skips dry run.&lt;/p&gt;

&lt;p&gt;Stepup command due to election handoff &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5eeb0955011cf96d0218ac0a9d7f54adc9584173/src/mongo/db/repl/replication_coordinator_impl_elect_v1.cpp#L150-L158&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;skips dry run and writes down the vote for itself&lt;/a&gt; after changing its role to kCandidate, then releases the mutex. Another thread calling _cancelElectionIfNeeded_inlock() will hit the invariant if it runs in this window until the node finishes the write and starts _voteRequester.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1272219">SERVER-46850</key>
            <summary>Stepup due to election handoff may not have _voteRequester when it&apos;s candidate</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="siyuan.zhou@mongodb.com">Siyuan Zhou</assignee>
                                    <reporter username="siyuan.zhou@mongodb.com">Siyuan Zhou</reporter>
                        <labels>
                    </labels>
                <created>Fri, 13 Mar 2020 16:47:10 +0000</created>
                <updated>Mon, 18 May 2020 19:46:43 +0000</updated>
                            <resolved>Mon, 18 May 2020 19:32:01 +0000</resolved>
                                    <version>3.6.17</version>
                    <version>4.2.4</version>
                    <version>4.0.16</version>
                    <version>4.4.0</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3093678" author="siyuan.zhou@10gen.com" created="Mon, 18 May 2020 19:46:43 +0000"  >&lt;p&gt;I don&apos;t think&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48256&quot; title=&quot;Election cannot be canceled when writing its last vote&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48256&quot;&gt;&lt;del&gt;SERVER-48256&lt;/del&gt;&lt;/a&gt; will be backported back to 3.6. Since the original bug in BF is a rare race between election and transitioning to secondary, I&apos;d propose not backporting the fix to 4.2 and earlier versions until it&apos;s reported.&lt;/p&gt;</comment>
                            <comment id="3093640" author="siyuan.zhou@10gen.com" created="Mon, 18 May 2020 19:31:38 +0000"  >&lt;p&gt;Even if we skip vote request when it&apos;s null, the election isn&apos;t cancelled. This issue will be fixed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48256&quot; title=&quot;Election cannot be canceled when writing its last vote&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48256&quot;&gt;&lt;del&gt;SERVER-48256&lt;/del&gt;&lt;/a&gt;. Closing this as a dup.&lt;/p&gt;</comment>
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