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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-34018] Stashed transaction resources for snapshot reads can block the migration critical section, leading to stalls</title>
                <link>https://jira.mongodb.org/browse/SERVER-34018</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="514197">SERVER-34018</key>
            <summary>Stashed transaction resources for snapshot reads can block the migration critical section, leading to stalls</summary>
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                                            <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>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Tue, 20 Mar 2018 21:44:18 +0000</created>
                <updated>Tue, 6 Dec 2022 03:34:39 +0000</updated>
                            <resolved>Fri, 25 Jan 2019 13:50:31 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1841095" author="kaloian.manassiev" created="Wed, 21 Mar 2018 18:20:43 +0000"  >&lt;p&gt;Putting this to be considered as part of the planning for GPiTR for the next 2 iterations.&lt;/p&gt;</comment>
                            <comment id="1840261" author="tess.avitabile" created="Tue, 20 Mar 2018 21:52:21 +0000"  >&lt;p&gt;They can also block on the destination shard any time we take a MODE_X lock during migration. For example, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/152e55c697613b0d99c619e9569fd6e57c303d2f/src/mongo/db/s/migration_destination_manager.cpp#L638&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we take a MODE_X lock on the database when we check if the collection exists&lt;/a&gt;.&lt;/p&gt;</comment>
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