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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-39124] Mongos should send abort to cleared participants between retries of transaction statements</title>
                <link>https://jira.mongodb.org/browse/SERVER-39124</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When mongos encounters an error during a transaction, if the error is &quot;retryable&quot; (e.g. snapshot error on first client statement), it will remove newly added participants from the participant list and retry the request, relying on shards implicitly aborting transactions started for the first attempt before servicing the new one.&lt;/p&gt;

&lt;p&gt;If the operation on the router is killed (e.g. by &lt;tt&gt;killOp&lt;/tt&gt;) after it clears pending participants but before it re-targets, the router will not know to send abort to the shards targeted by the first attempt, which may leave transactions open. To handle this and to simplify the contract around router retries, the router should instead send &lt;tt&gt;abortTransaction&lt;/tt&gt; to all shards it removes from the participant list (waiting for all responses)&#160;before retrying. The ability for a shard to start a new transaction at the same number as an in-progress one should also be removed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="676018">SERVER-39124</key>
            <summary>Mongos should send abort to cleared participants between retries of transaction statements</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="jack.mulrow@mongodb.com">Jack Mulrow</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                            <label>ShardedTxn:RouterSupport</label>
                    </labels>
                <created>Tue, 22 Jan 2019 18:13:14 +0000</created>
                <updated>Sun, 29 Oct 2023 22:24:55 +0000</updated>
                            <resolved>Tue, 29 Jan 2019 22:34:54 +0000</resolved>
                                                    <fixVersion>4.1.8</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2131578" author="xgen-internal-githook" created="Wed, 30 Jan 2019 02:51:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;jack.mulrow@mongodb.com&apos;, &apos;name&apos;: &apos;Jack Mulrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39124&quot; title=&quot;Mongos should send abort to cleared participants between retries of transaction statements&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39124&quot;&gt;&lt;del&gt;SERVER-39124&lt;/del&gt;&lt;/a&gt; Mongos should abort cleared participants between retries of transaction statements&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7380d6e9ad0a90f6c5758b52d166d4069dd5a502&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7380d6e9ad0a90f6c5758b52d166d4069dd5a502&lt;/a&gt;&lt;/p&gt;</comment>
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