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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-51493] Revisit how config.transactions cloner for resharding blocks thread waiting for outstanding prepared transaction to resolve</title>
                <link>https://jira.mongodb.org/browse/SERVER-51493</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;One option would be to schedule the callback on the Fetcher after the TransactionParticipant::onExitPrepare() future resolves. Another option would be to use a dedicated thread for the config.transactions cloner for resharding to prevent a liveness issue.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1510698">SERVER-51493</key>
            <summary>Revisit how config.transactions cloner for resharding blocks thread waiting for outstanding prepared transaction to resolve</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="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>PM-234-M3</label>
                            <label>PM-234-T-config-txn-clone</label>
                    </labels>
                <created>Mon, 12 Oct 2020 15:27:39 +0000</created>
                <updated>Sun, 29 Oct 2023 22:02:06 +0000</updated>
                            <resolved>Wed, 2 Dec 2020 12:39:38 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3511766" author="xgen-internal-githook" created="Wed, 2 Dec 2020 02:46:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51493&quot; title=&quot;Revisit how config.transactions cloner for resharding blocks thread waiting for outstanding prepared transaction to resolve&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51493&quot;&gt;&lt;del&gt;SERVER-51493&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52922&quot; title=&quot;Have config.transactions cloner for resharding resume from its progress lsid&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52922&quot;&gt;&lt;del&gt;SERVER-52922&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52938&quot; title=&quot;Move resharding_txn_cloner files into db/s/resharding directory&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52938&quot;&gt;&lt;del&gt;SERVER-52938&lt;/del&gt;&lt;/a&gt; Create ReshardingTxnCloner class.&lt;/p&gt;

&lt;p&gt;Introduces sharded_agg_helpers::runPipelineDirectlyOnSingleShard()&lt;br/&gt;
function to replace the usage of the Fetcher class. ReshardingTxnCloner&lt;br/&gt;
yields its thread while waiting for a prepared transaction on a session&lt;br/&gt;
to commit or abort. ReshardingTxnCloner runs on the recipient&lt;br/&gt;
primary-only service&apos;s task executor rather than on the fixed executor.&lt;br/&gt;
The returned mongo::Future is readied when the cloning procedure has&lt;br/&gt;
completed successfully or failed with an error.&lt;/p&gt;

&lt;p&gt;ReshardingTxnCloner reads the progress document from the&lt;br/&gt;
config.localReshardingOperations.recipient.progress_txn_cloner&lt;br/&gt;
collection when starting up. The reshardingTxnClonerProgressBatchSize&lt;br/&gt;
server parameter controls how often ReshardingTxnCloner updates its&lt;br/&gt;
progress document.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a3566ca80376617843c642cf0e5891b2f08681f2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a3566ca80376617843c642cf0e5891b2f08681f2&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1544652">SERVER-52921</issuekey>
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            <issuekey id="1555325">SERVER-53139</issuekey>
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