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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-78401] re-order change streams collection writes in OpObserverImpl methods</title>
                <link>https://jira.mongodb.org/browse/SERVER-78401</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In OpObserverImpl, after writing the oplog entry, we may write the pre-image to the change streams collection. As a prerequisite to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78300&quot; title=&quot;Use expectPrefix in the tenant aware response checker&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78300&quot;&gt;&lt;del&gt;SERVER-78300&lt;/del&gt;&lt;/a&gt;, it would be nice to re-order the change streams access to be the last action in the OpObserverImpl methods that require it - after installing the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/op_observer/op_observer_impl.cpp#L1014&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;RecoveryUnit commit handler for the session transaction record&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/op_observer/op_observer_impl.cpp#L1821&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;writing the image for findAndModify&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2375985">SERVER-78401</key>
            <summary>re-order change streams collection writes in OpObserverImpl methods</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>Fri, 23 Jun 2023 17:44:27 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:35 +0000</updated>
                            <resolved>Wed, 5 Jul 2023 15:03:52 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5543114" author="xgen-internal-githook" created="Tue, 4 Jul 2023 20:55:55 +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-78401&quot; title=&quot;re-order change streams collection writes in OpObserverImpl methods&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78401&quot;&gt;&lt;del&gt;SERVER-78401&lt;/del&gt;&lt;/a&gt; OpObserverImpl::onUnpreparedTransactionCommit() writes change streams pre-image after writing findAndModify image&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0655953dcf8924941c5ace06ac4ebe95639fb0f4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0655953dcf8924941c5ace06ac4ebe95639fb0f4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5542506" author="xgen-internal-githook" created="Tue, 4 Jul 2023 12:57:48 +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-78401&quot; title=&quot;re-order change streams collection writes in OpObserverImpl methods&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78401&quot;&gt;&lt;del&gt;SERVER-78401&lt;/del&gt;&lt;/a&gt; OpObserverImpl::onDelete() writes change streams pre-image after updating logical session record&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f3d6086347d13c59a8cda124d6d4c517a5f94074&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f3d6086347d13c59a8cda124d6d4c517a5f94074&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5541706" author="xgen-internal-githook" created="Tue, 4 Jul 2023 00:25:48 +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-78401&quot; title=&quot;re-order change streams collection writes in OpObserverImpl methods&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78401&quot;&gt;&lt;del&gt;SERVER-78401&lt;/del&gt;&lt;/a&gt; OpObserverImpl::onUpdate() writes change streams pre-image after updating logical session record&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f8984ec3c09c098c509b65e22e79c27537915b5a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f8984ec3c09c098c509b65e22e79c27537915b5a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5541509" author="xgen-internal-githook" created="Mon, 3 Jul 2023 21:12:24 +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-78401&quot; title=&quot;re-order change streams collection writes in OpObserverImpl methods&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78401&quot;&gt;&lt;del&gt;SERVER-78401&lt;/del&gt;&lt;/a&gt; declare default accumulator value in MigrationChunkClonerSourceOpObserver::onDelete()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a46e261248e6bc071fa2890601b2c2bf3fd84624&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a46e261248e6bc071fa2890601b2c2bf3fd84624&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2385090">SERVER-78733</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2373957">SERVER-78310</issuekey>
        </issuelink>
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