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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-28962] RenameCollection oplog entry field dropTarget can have 2 types</title>
                <link>https://jira.mongodb.org/browse/SERVER-28962</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The Collection Versioning design proposes changing the dropTarget field of the RenameCollection oplog entry to potentially be a boolean and potentially be a UUID. This will make it difficult to parse and handle RenameCollection oplog entries wherever we need to. One suggestion to make this easier is to split this into two fields, one that is a boolean, dropTarget, and one that is a UUID, dropTargetUUID, where the UUID field only exists if the boolean dropTarget field is true. Adding new fields is generally easier because older versions can just ignore them. &lt;/p&gt;</description>
                <environment></environment>
        <key id="377392">SERVER-28962</key>
            <summary>RenameCollection oplog entry field dropTarget can have 2 types</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Apr 2017 16:02:32 +0000</created>
                <updated>Fri, 27 Oct 2023 20:44:06 +0000</updated>
                            <resolved>Fri, 3 Jan 2020 20:19:49 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2703224" author="judah.schvimer" created="Fri, 3 Jan 2020 20:19:49 +0000"  >&lt;p&gt;I&apos;m fairly sure this went away with &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34196&quot; title=&quot;OpObserver::onRenameCollection() dropTarget boolean argument is redundant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34196&quot;&gt;&lt;del&gt;SERVER-34196&lt;/del&gt;&lt;/a&gt;. Either way it&apos;s not a pain point now.&lt;/p&gt;</comment>
                            <comment id="1569713" author="geert.bosch" created="Fri, 12 May 2017 14:48:12 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=judah.schvimer&quot; class=&quot;user-hover&quot; rel=&quot;judah.schvimer&quot;&gt;judah.schvimer&lt;/a&gt; and I decided to go with the wrapper approach. This workaround can be removed once we drop support for upgrading from MongoDB 3.4 and older.&lt;/p&gt;</comment>
                            <comment id="1557464" author="judah.schvimer" created="Tue, 25 Apr 2017 17:20:44 +0000"  >&lt;p&gt;An alternative to changing the field would be to create a wrapper around RenameCollection that handles the two types. We could also make a boolean parse to a special UUID value and handle it in the IDL (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/idl/unittest.idl#L68-L82&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/master/src/mongo/idl/unittest.idl#L68-L82&lt;/a&gt;), though I think the wrapper is a better solution.&lt;/p&gt;</comment>
                            <comment id="1557424" author="geert.bosch" created="Tue, 25 Apr 2017 16:53:50 +0000"  >&lt;p&gt;If we decide we only need dropTarget in the oplog entry if the target has a UUID, that would be a nice simplification.&lt;/p&gt;</comment>
                            <comment id="1557422" author="schwerin" created="Tue, 25 Apr 2017 16:49:15 +0000"  >&lt;p&gt;What&apos;s the point of the dropTarget boolean value in the oplog entry in 3.4 and prior? The secondary oplog application process would have to ignore it, anyways.&lt;/p&gt;</comment>
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