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    <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-66000] Make post-downgrade retry error for retryable writes that are executed using internal transactions consistent</title>
                <link>https://jira.mongodb.org/browse/SERVER-66000</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58761&quot; title=&quot;[Upgrade/downgrade] Make setFCV delete the config.transactions entries for all child sessions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58761&quot;&gt;&lt;del&gt;SERVER-58761&lt;/del&gt;&lt;/a&gt; made setFVC do the following:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;For each session that has an internal session that executed retryable internal transactions for a command with txnNumber (i.e. as indicated by its lsid.txnNumber) greater or equal to the latest txnNumber in the parent session, update the config.transactions entry for the parent session to have txnNumber equal to that lsid.txnNumber and lastWriteOpTime equal to {t: 1, ts: Timestamp(1, 0)}.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;However, it didn&apos;t make setFCV unset/set the &quot;state&quot; field in the config.transactions entry for the parent session as part of that write. So a retry after a downgrade would get an IncompleteTransactionHistory with the message &lt;a href=&quot;https://github.com/mongodb/mongo/blob/53ce56437ce9df0bcb3c588b37ab86e484db2f99/src/mongo/db/transaction_participant.cpp#L733-L735&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;Cannot retry a retryable write that has been converted into a transaction&quot;&lt;/a&gt; if the previous txnNumber on the parent session corresponds to a transaction and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/53ce56437ce9df0bcb3c588b37ab86e484db2f99/src/mongo/db/transaction_participant.cpp#L3093-L3097&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;Incomplete history detected for transaction&quot;&lt;/a&gt; if the previous txnNumber on the parent session corresponds to a retryable write. We should make it such that there can only be one kind of error message. One way to do is this to unset the &quot;state&quot; field or set it &quot;committed&quot;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2033972">SERVER-66000</key>
            <summary>Make post-downgrade retry error for retryable writes that are executed using internal transactions consistent</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-sharding-nyc">[DO NOT USE] Backlog - Sharding NYC</assignee>
                                    <reporter username="cheahuychou.mao@mongodb.com">Cheahuychou Mao</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 Apr 2022 03:04:54 +0000</created>
                <updated>Tue, 6 Dec 2022 00:11:13 +0000</updated>
                            <resolved>Thu, 28 Apr 2022 17:54:08 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4514076" author="jack.mulrow" created="Thu, 28 Apr 2022 17:54:08 +0000"  >&lt;p&gt;This should be very unlikely for customer workloads to hit and is not a correctness issue, just a slightly confusing error message, so closing as won&apos;t fix.&lt;/p&gt;</comment>
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