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    <title>MongoDB Jira</title>
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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-29662] Fix index drop/create step in uuid enabled rollback</title>
                <link>https://jira.mongodb.org/browse/SERVER-29662</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In featureCompatabilityVersion 3.4, the oplog entries for createIndexes operations were &quot;insert&quot; operations into *.system.indexes. In featureCompatabilityVersion 3.6, we have changed createIndexes operations to be &quot;c&quot; type operations, which affect the databases at a high level. We need to change the rollback logic for rolling back createIndexes operations to reflect this new oplog entry format for uuid enabled rollback.&lt;/p&gt;

&lt;p&gt;Additionally, currently we resync the entire collection when rolling back create/drop index operations. We want to change the algorithm so that these full collection resyncs are no longer necessary.&lt;/p&gt;</description>
                <environment></environment>
        <key id="394454">SERVER-29662</key>
            <summary>Fix index drop/create step in uuid enabled rollback</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="allison.chang">Allison Chang</assignee>
                                    <reporter username="allison.chang">Allison Chang</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jun 2017 18:02:02 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:01 +0000</updated>
                            <resolved>Wed, 26 Jul 2017 19:25:29 +0000</resolved>
                                    <version>Backlog</version>
                                    <fixVersion>3.5.11</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1633543" author="xgen-internal-githook" created="Thu, 27 Jul 2017 16:10:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;allison.chang@10gen.com&apos;, &apos;username&apos;: &apos;archang68&apos;, &apos;name&apos;: &apos;Allison Chang&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29662&quot; title=&quot;Fix index drop/create step in uuid enabled rollback&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29662&quot;&gt;&lt;del&gt;SERVER-29662&lt;/del&gt;&lt;/a&gt; Fix rs_rollback_test RollbackCreateIndexCommandMissingIndexName&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b6198c3a315d4b6775425d2dc8edab87d350194d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b6198c3a315d4b6775425d2dc8edab87d350194d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1632641" author="xgen-internal-githook" created="Wed, 26 Jul 2017 19:24:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;allison.chang@10gen.com&apos;, &apos;username&apos;: &apos;archang68&apos;, &apos;name&apos;: &apos;Allison Chang&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29662&quot; title=&quot;Fix index drop/create step in uuid enabled rollback&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29662&quot;&gt;&lt;del&gt;SERVER-29662&lt;/del&gt;&lt;/a&gt; Make rollback of dropIndexes/createIndexes UUID compatible&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53006d607192ee3bbaaa185fc6b1a8446e0cde8f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53006d607192ee3bbaaa185fc6b1a8446e0cde8f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1605580" author="milkie" created="Fri, 23 Jun 2017 20:02:57 +0000"  >&lt;p&gt;Ah yes.  &quot;c&quot; means Command, in this case.&lt;/p&gt;</comment>
                            <comment id="1605555" author="allison.chang" created="Fri, 23 Jun 2017 19:29:44 +0000"  >&lt;p&gt;In oplog entries there is an &quot;op&quot; field that denotes the type of operation that takes place. &quot;i&quot; stands for insert, &quot;u&quot; for update, etc. What I meant by a create operation is that the op field is denoted as &quot;c,&quot; but since not all operations that are denoted as &quot;c&quot; type operations are create operations, I&apos;ll update the description of the ticket to make it more clear what I mean.&lt;/p&gt;</comment>
                            <comment id="1605456" author="milkie" created="Fri, 23 Jun 2017 17:53:20 +0000"  >&lt;p&gt;I don&apos;t understand the description here; what is a &quot;create&quot; operation?&lt;/p&gt;</comment>
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