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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-41146] commitTransaction on mongos can leave the transaction open on some participants if one participant returns an error</title>
                <link>https://jira.mongodb.org/browse/SERVER-41146</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is because the ARS is not guaranteed to send a request to each remote at least once: the ARS can be destroyed before scheduling all the requests, which will cause the requests that had yet to be scheduled to return &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e4b13ae68a4eef9393357038f09f14bfd8102050/src/mongo/db/baton.cpp#L56&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this error&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;The fix could be to make commitTransaction use gatherResponses, which fully exhausts the ARS before returning. However, for the single-write-shard commit path, we should take care to send abortTransaction to the single write shard if one of the read-only shards returned an error to commitTransaction.&lt;/p&gt;</description>
                <environment></environment>
        <key id="768203">SERVER-41146</key>
            <summary>commitTransaction on mongos can leave the transaction open on some participants if one participant returns an error</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="13202">Works as Designed</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Tue, 14 May 2019 18:04:27 +0000</created>
                <updated>Fri, 27 Oct 2023 13:53:14 +0000</updated>
                            <resolved>Thu, 16 May 2019 14:19:01 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2248818" author="esha.maharishi@10gen.com" created="Thu, 16 May 2019 14:18:44 +0000"  >&lt;p&gt;Closing as Works as Designed - I thought the implicit abort was only executed in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/307259e53d8bc276274bb4e88b82821b4c6d001c/src/mongo/s/commands/strategy.cpp#L176&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this catch block&lt;/a&gt;, and since commitTransaction returns a participant&apos;s error response instead of throwing if a participant returns an error, that the implicit abort was not being executed after commitTransaction.&lt;/p&gt;

&lt;p&gt;But actually the implicit abort is also called &lt;a href=&quot;https://github.com/mongodb/mongo/blob/307259e53d8bc276274bb4e88b82821b4c6d001c/src/mongo/s/commands/strategy.cpp#L312-L320&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; where it checks the response object for &apos;ok:0&apos;.&lt;/p&gt;</comment>
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