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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-38609] Invalidate sessions that have a retryable write on stepDown instead of stepUp</title>
                <link>https://jira.mongodb.org/browse/SERVER-38609</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a node becomes primary, we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d917a363457eadd2086b6ef4abae1ce0892aab98/src/mongo/db/session_catalog_mongod.cpp#L102-L118&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;invalidate sessions that could have a retryable write on them&lt;/a&gt; because secondaries don&apos;t keep retryable writes state up-to-date. It would be more appropriate to refresh this state on stepDown instead. &lt;/p&gt;</description>
                <environment></environment>
        <key id="653130">SERVER-38609</key>
            <summary>Invalidate sessions that have a retryable write on stepDown instead of stepUp</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="samy.lanka@mongodb.com">Samyukta Lanka</reporter>
                        <labels>
                            <label>gm-ack</label>
                    </labels>
                <created>Thu, 13 Dec 2018 17:13:36 +0000</created>
                <updated>Mon, 3 Jun 2019 20:00:55 +0000</updated>
                            <resolved>Mon, 3 Jun 2019 20:00:55 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2269522" author="renctan" created="Mon, 3 Jun 2019 20:00:55 +0000"  >&lt;p&gt;Confirmed that w: majority would fail when ran on secondary because of this check: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9d212e4f098ccf4821fd6a1acde60402373b70ee/src/mongo/db/repl/replication_coordinator_impl.cpp#L1712&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/9d212e4f098ccf4821fd6a1acde60402373b70ee/src/mongo/db/repl/replication_coordinator_impl.cpp#L1712&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2235757" author="kaloian.manassiev" created="Mon, 6 May 2019 17:50:45 +0000"  >&lt;p&gt;Spoke with Randolph in person.&lt;/p&gt;

&lt;p&gt;Because the check for whether a write happened or not is done outside of a lock, this means a stepDown and rollback can happen concurrently. Now, this is not a problem per-se for local writes, because we don&apos;t guarantee they won&apos;t be rolled back, but as part of this ticket we need to check whether a wait for majority will also succeed in that situation, because that would be incorrect.&lt;/p&gt;</comment>
                            <comment id="2235705" author="kaloian.manassiev" created="Mon, 6 May 2019 17:42:30 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=renctan&quot; class=&quot;user-hover&quot; rel=&quot;renctan&quot;&gt;renctan&lt;/a&gt;, I assume you are referring to the rollback case, right? But if the callers are using a majority write concern, they will not get a response based on outdated information, only if they are using local. But with local write concern this is a problem regardless of when we do cleaning of the session catalog.&lt;/p&gt;</comment>
                            <comment id="2235666" author="renctan" created="Mon, 6 May 2019 17:25:20 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt; Based on my comment above, there is in potential bug: secondaries can claim that write was written based on information possibly invalidated by primary.&lt;/p&gt;</comment>
                            <comment id="2128148" author="renctan" created="Fri, 25 Jan 2019 21:29:31 +0000"  >&lt;p&gt;Confirmed that we don&apos;t have the DB/coll lock while calling checkStatementExecuted, so a secondary in theory can respond that it did a write based on outdated information. &lt;/p&gt;</comment>
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