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    <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-61258] Test mongos/mongoq handling TenantMigrationAborted inside a transaction</title>
                <link>https://jira.mongodb.org/browse/SERVER-61258</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Update the existing tests of sending commands through mongos/mongoq during a tenant migration to confirm they are handled correctly when run inside a transaction.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Background&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;A transaction is a series of commands sent under a session with the same txnNumber and ending with a commitTransaction (see &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5c19a427713891054cafa9b7a002d65dd5668189/jstests/replsets/tenant_migration_commit_transaction_retry.js#L50-L53&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;example&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;If the commitTransaction is received on a donor while a tenant migration is blocking, the commitTransaction will hit the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5c19a427713891054cafa9b7a002d65dd5668189/src/mongo/db/op_observer_impl.cpp#L1573&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;checkIfCanWriteOrThrow in OpObserverImpl::onUnpreparedTransactionCommit&lt;/a&gt;, which will throw TenantMigrationConflict. This TenantMigrationConflict exception will abort the transaction on the donor. The commitTransaction should return TenantMigrationAborted with a TransientTransactionError label.&lt;/p&gt;

&lt;p&gt;If the tenant migration eventually aborts, mongoq/mongos will not retry the commitTransaction against the donor. If the client retry the commitTransaction against donor, since the donor has already aborted the transaction, the commitTransaction should return NoSuchTransaction (this error code essentially means &quot;transaction aborted&quot;) with a TransientTransactionError label, as asserted &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5c19a427713891054cafa9b7a002d65dd5668189/jstests/replsets/tenant_migration_concurrent_reads_on_donor.js#L82-L89&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;This ticket&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;This ticket is to confirm that mongoq correctly propagates back the NoSuchTransaction with TransientTransactionError in this case.&lt;/p&gt;

&lt;p&gt;See &lt;a href=&quot;https://github.com/mongodb/mongo/blob/364f00f2fc5f4325bb8437bb2332d109f1f875a8/jstests/sharding/update_shard_key_doc_moves_shards.js#L398-L402&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; for an example of running a command in a transaction. We can test with the findAndModify command.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1918507">SERVER-61258</key>
            <summary>Test mongos/mongoq handling TenantMigrationAborted inside 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="13201">Fixed</resolution>
                                        <assignee username="sophia.tan@mongodb.com">Sophia Tan</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Thu, 4 Nov 2021 19:30:10 +0000</created>
                <updated>Sun, 29 Oct 2023 21:46:27 +0000</updated>
                            <resolved>Thu, 18 Nov 2021 16:03:28 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4196909" author="xgen-internal-githook" created="Thu, 18 Nov 2021 06:53:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sophia Tan&apos;, &apos;email&apos;: &apos;sophia_tll@hotmail.com&apos;, &apos;username&apos;: &apos;sophiatll&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61258&quot; title=&quot;Test mongos/mongoq handling TenantMigrationAborted inside a transaction&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61258&quot;&gt;&lt;del&gt;SERVER-61258&lt;/del&gt;&lt;/a&gt; Test mongos/mongoq handling TenantMigrationAborted inside a transaction&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bd6b08daed4a016f5758970f1ecb760087ba62d9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bd6b08daed4a016f5758970f1ecb760087ba62d9&lt;/a&gt;&lt;/p&gt;</comment>
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