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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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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-76581] Server can return stale topologyVersion to clients on stepdown due to heartbeats</title>
                <link>https://jira.mongodb.org/browse/SERVER-76581</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, I think it&apos;s possible that the server will kill operations as part of &lt;a href=&quot;https://github.com/10gen/mongo/blob/4d541df08dde02eb967c8f2720e1e46beb88ff9c/src/mongo/db/repl/replication_coordinator_impl_heartbeat.cpp#L551&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stepdown due to heartbeats &lt;/a&gt;, and return a stale TopologyVersion because we don&apos;t call &lt;a href=&quot;https://github.com/10gen/mongo/blob/4d541df08dde02eb967c8f2720e1e46beb88ff9c/src/mongo/db/repl/replication_coordinator_impl.cpp#L4529&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;fulfillTopologyPromise&lt;/a&gt; (as part of &lt;a href=&quot;https://github.com/10gen/mongo/blob/4d541df08dde02eb967c8f2720e1e46beb88ff9c/src/mongo/db/repl/replication_coordinator_impl_heartbeat.cpp#L579&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_updateMemberStateFromTopologyCoordinator&lt;/a&gt;) until after we kill the operations. &lt;/p&gt;

&lt;p&gt;This causes issues with retryable writes if a server returns a response with error &lt;tt&gt;InterruptedDueToReplStatechange&lt;/tt&gt; with topologyVersion N (unchanged), and the driver will not know to mark the server as unknown before retrying the same write to the same node that is no longer a primary.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2325419">SERVER-76581</key>
            <summary>Server can return stale topologyVersion to clients on stepdown due to heartbeats</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="13201">Fixed</resolution>
                                        <assignee username="matthew.russotto@mongodb.com">Matthew Russotto</assignee>
                                    <reporter username="jason.chan@mongodb.com">Jason Chan</reporter>
                        <labels>
                            <label>repl-shortlist</label>
                    </labels>
                <created>Wed, 26 Apr 2023 20:40:32 +0000</created>
                <updated>Sun, 29 Oct 2023 21:22:26 +0000</updated>
                            <resolved>Tue, 18 Jul 2023 18:03:18 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="5571450" author="xgen-internal-githook" created="Mon, 17 Jul 2023 17:14:26 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;email&apos;: &apos;matthew.russotto@mongodb.com&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-76581&quot; title=&quot;Server can return stale topologyVersion to clients on stepdown due to heartbeats&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76581&quot;&gt;&lt;del&gt;SERVER-76581&lt;/del&gt;&lt;/a&gt; Server can return stale topologyVersion to clients on stepdown due to heartbeats&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/76c01d4b4230bc75dbf22b1385015f88fbeab374&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/76c01d4b4230bc75dbf22b1385015f88fbeab374&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5379071" author="jason.chan" created="Wed, 26 Apr 2023 20:46:51 +0000"  >&lt;p&gt;I think this is the same problem as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53431&quot; title=&quot;Server should respond running operations with appropriate topologyVersion on stepdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53431&quot;&gt;&lt;del&gt;SERVER-53431&lt;/del&gt;&lt;/a&gt; but we only put in the fix for the stepdown command code path in that patch.&lt;/p&gt;</comment>
                            <comment id="5379047" author="jason.chan" created="Wed, 26 Apr 2023 20:41:33 +0000"  >&lt;p&gt;I think this might be the same in the &lt;a href=&quot;https://github.com/10gen/mongo/blob/4d541df08dde02eb967c8f2720e1e46beb88ff9c/src/mongo/db/repl/replication_coordinator_impl_heartbeat.cpp#L977&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stepdown due to reconfig&lt;/a&gt; codepath. We might want to audit for any cases where we acquire the RSTL and kill operations before fulfilling the topology change promise.&lt;/p&gt;</comment>
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