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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-37502] Consider sending database version for all commands allowed in a transaction</title>
                <link>https://jira.mongodb.org/browse/SERVER-37502</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The only command allowed in a transaction that currently sends database version is &lt;tt&gt;distinct&lt;/tt&gt;. Similarly to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37501&quot; title=&quot;Version multi-updates and multi-deletes in sharded transactions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37501&quot;&gt;&lt;del&gt;SERVER-37501&lt;/del&gt;&lt;/a&gt;, this allows transactions to take locks for databases that the router coordinating the transaction is stale for, which would force database versioned writes outside the transaction that trigger a stale database version error to wait for the transaction to complete before the shard is able to refresh its database version metadata (because it &lt;a href=&quot;https://github.com/mongodb/mongo/blob/955fc08dd1/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L252&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;requires an exclusive lock on the database&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;If all of the commands that run in a transaction sent database version, then a transaction wouldn&apos;t be able to take locks for a database it has stale metadata for, avoiding this.&lt;/p&gt;</description>
                <environment></environment>
        <key id="614854">SERVER-37502</key>
            <summary>Consider sending database version for all commands allowed in a transaction</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                            <label>ShardedTxn:RouterSupport</label>
                    </labels>
                <created>Fri, 5 Oct 2018 21:49:52 +0000</created>
                <updated>Tue, 6 Dec 2022 03:16:19 +0000</updated>
                            <resolved>Tue, 5 Mar 2019 16:27:20 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2171201" author="greg.mckeon" created="Tue, 5 Mar 2019 16:27:20 +0000"  >&lt;p&gt;This is related to PM-1051, and we may address it as part of that work.&lt;/p&gt;</comment>
                            <comment id="2026167" author="renctan" created="Mon, 8 Oct 2018 05:33:21 +0000"  >&lt;p&gt;Note that the reason the plain CRUD op commands don&apos;t currently send DB version is because it would be redundant once we make all unsharded collections own chunks.&lt;/p&gt;</comment>
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