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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-57545] Stepping down while stepping up with a transaction prepared results in a broken node</title>
                <link>https://jira.mongodb.org/browse/SERVER-57545</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It is possible for a stepdown to start due to some other primary stepping up while we are still holding the RSTL from a step-up attempt.  If we do this while we have a transaction prepared, we will uassert when trying to check out a session to restore the prepared transactions locks.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/b9c4dc61d38edd4ae1c4953dbc646fac633d78d0/src/mongo/db/session_catalog_mongod.cpp#L271&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/b9c4dc61d38edd4ae1c4953dbc646fac633d78d0/src/mongo/db/session_catalog_mongod.cpp#L271&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The uassert will cause use to exit signalDrainComplete() without actually signalling that the drain is complete.  At that point the oplog applier (and thus replication) will be stuck.&lt;/p&gt;

&lt;p&gt;In addition to fixing this, we should probably mark signalDrainComplete() as &quot;noexcept&quot; so we crash instead of hanging if anything similar happens.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1773452">SERVER-57545</key>
            <summary>Stepping down while stepping up with a transaction prepared results in a broken node</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="vesselina.ratcheva@mongodb.com">Vesselina Ratcheva</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
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                <created>Tue, 8 Jun 2021 22:31:53 +0000</created>
                <updated>Tue, 13 Jul 2021 17:57:19 +0000</updated>
                            <resolved>Tue, 13 Jul 2021 17:57:07 +0000</resolved>
                                                                                        <votes>0</votes>
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