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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-66359] Add the &quot;Internal Transactions&quot; section to the sharding architecture guide</title>
                <link>https://jira.mongodb.org/browse/SERVER-66359</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The section should cover the following:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Non-retryable internal transactions&lt;/li&gt;
	&lt;li&gt;Retryable internal transactions
	&lt;ul&gt;
		&lt;li&gt;How retryablity works
		&lt;ul&gt;
			&lt;li&gt;The &#8220;stmtId&#8221;, &#8220;preImageOpTime&#8221;, &#8220;postImageOpTime&#8221;, &#8220;needsRetryImage&#8221; fields in the inner oplog entries inside each applyOps oplog entry.&lt;/li&gt;
			&lt;li&gt;How each retryable write statement generates only one operation entry with its stmtId; any other operation entries have stmtId=-1.&lt;/li&gt;
			&lt;li&gt;How each internal session can only have one retryable findAndModify.&#160;&lt;br/&gt;
refreshFromStorageIfNeeded() and RetryableTransactionParticipantCatalog.&lt;/li&gt;
			&lt;li&gt;How concurrent retries are prevented (i.e. RetryableTransactionInProgress).&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
		&lt;li&gt;Session migration during chunk migration and resharding
		&lt;ul&gt;
			&lt;li&gt;Retryability contract.&lt;/li&gt;
			&lt;li&gt;How retryable internal transaction oplog entries are converted to retryable write oplog entries.&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2043541">SERVER-66359</key>
            <summary>Add the &quot;Internal Transactions&quot; section to the sharding architecture guide</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="jason.zhang@mongodb.com">Jason Zhang</assignee>
                                    <reporter username="cheahuychou.mao@mongodb.com">Cheahuychou Mao</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 May 2022 16:19:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:38:23 +0000</updated>
                            <resolved>Thu, 7 Jul 2022 17:08:52 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4663584" author="xgen-internal-githook" created="Thu, 7 Jul 2022 15:26:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Zhang&apos;, &apos;email&apos;: &apos;jason.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;jz1242&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66359&quot; title=&quot;Add the &amp;quot;Internal Transactions&amp;quot; section to the sharding architecture guide&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66359&quot;&gt;&lt;del&gt;SERVER-66359&lt;/del&gt;&lt;/a&gt; Add the &quot;Internal Transactions&quot; section to the sharding architecture guide&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/adcd52319933d187fc2070c521feddccc8e48cd2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/adcd52319933d187fc2070c521feddccc8e48cd2&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1653893">SERVER-55346</issuekey>
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