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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-78733] TransactionParticipant generates applyOps entry information for unprepared transactions rather than delegating to OpObserverImpl</title>
                <link>https://jira.mongodb.org/browse/SERVER-78733</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;OpObserverImpl::onUnpreparedTransactionCommit() currently &lt;span class=&quot;error&quot;&gt;&amp;#91;generates the applyOps oplog entry information||https://github.com/mongodb/mongo/blob/f9a49ec48ad035ca2f6701f5f458aef57dd70438/src/mongo/db/op_observer/op_observer_impl.cpp#L1760&amp;#93;&lt;/span&gt; internally for &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f9a49ec48ad035ca2f6701f5f458aef57dd70438/src/mongo/db/op_observer/op_observer_impl.cpp#L1794&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;writing the unprepared applyOps entries to the oplog&lt;/a&gt; and pass to the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f9a49ec48ad035ca2f6701f5f458aef57dd70438/src/mongo/db/op_observer/op_observer_impl.cpp#L1829&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;change streams pre-image helper&lt;/a&gt;. We also &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f9a49ec48ad035ca2f6701f5f458aef57dd70438/src/mongo/db/op_observer/op_observer_impl.cpp#L1744&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;reserve the oplog slots&lt;/a&gt; within this function.&lt;/p&gt;

&lt;p&gt;Doing both of these operations within the OpObserverImpl method makes it inconvenient for us to extract the change streams pre-image logic into a separate OpObserver implementation in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78310&quot; title=&quot;move change stream pre-image logic out of OpObserverImpl&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78310&quot;&gt;&lt;del&gt;SERVER-78310&lt;/del&gt;&lt;/a&gt;. We should consider generating the applyOps info at the callsite in TransactionParticipant and pass it into the OpObserver interface.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2385090">SERVER-78733</key>
            <summary>TransactionParticipant generates applyOps entry information for unprepared transactions rather than delegating to OpObserverImpl</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Thu, 6 Jul 2023 16:02:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:10 +0000</updated>
                            <resolved>Tue, 18 Jul 2023 13:36:28 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5551062" author="xgen-internal-githook" created="Fri, 7 Jul 2023 16:58:20 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78733&quot; title=&quot;TransactionParticipant generates applyOps entry information for unprepared transactions rather than delegating to OpObserverImpl&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78733&quot;&gt;&lt;del&gt;SERVER-78733&lt;/del&gt;&lt;/a&gt; TransactionParticipant generates applyOps entry information for unprepared transactions rather than delegating to OpObserverImpl&lt;/p&gt;

&lt;p&gt;This commit also moves the oplog reservation logic, which is used for generating&lt;br/&gt;
the applyOps entry information, out of OpObserverImpl into TransactionParticipant.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9fa00b33c0997dfc59825bb41325e9718f03b88b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9fa00b33c0997dfc59825bb41325e9718f03b88b&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2373957">SERVER-78310</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2375980">SERVER-78400</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2375985">SERVER-78401</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2383965">SERVER-78675</issuekey>
        </issuelink>
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