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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-74200] Implement the 2-phase oplog notification in CreateCollectionCoordinator</title>
                <link>https://jira.mongodb.org/browse/SERVER-74200</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;shardCollection&lt;/tt&gt; is currently generating an op entry just &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a9a0ea1f23e3c5e2660e54e49694c7fb3e5d8abd/src/mongo/db/s/create_collection_coordinator.cpp#L1299&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;after committing&lt;/a&gt; its metadata into the sharding catalog - and in order to guarantee at-least-once-delivery semantics, also in case of early exits after a stepdown event (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/a9a0ea1f23e3c5e2660e54e49694c7fb3e5d8abd/src/mongo/db/s/create_collection_coordinator.cpp#L540-L548&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;1&lt;/a&gt;, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a9a0ea1f23e3c5e2660e54e49694c7fb3e5d8abd/src/mongo/db/s/create_collection_coordinator.cpp#L592-L599&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;2&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;Nevertheless, the current properties of the DDL do not guarantee that the timestamp of the op entry will always predate the time of the first user write within the sharded collection.&lt;/p&gt;

&lt;p&gt;To overcome these inaccuracies, the commit may be described on the oplog through a 2-phase protocol.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2270215">SERVER-74200</key>
            <summary>Implement the 2-phase oplog notification in CreateCollectionCoordinator</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="enrico.golfieri@mongodb.com">Enrico Golfieri</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                    </labels>
                <created>Tue, 21 Feb 2023 08:03:00 +0000</created>
                <updated>Sun, 29 Oct 2023 21:25:58 +0000</updated>
                            <resolved>Wed, 22 Mar 2023 16:02:49 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5287416" author="xgen-internal-githook" created="Tue, 21 Mar 2023 10:11:34 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Enrico&apos;, &apos;email&apos;: &apos;enrico.golfieri@mongodb.com&apos;, &apos;username&apos;: &apos;enricogolfieri&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74200&quot; title=&quot;Implement the 2-phase oplog notification in CreateCollectionCoordinator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74200&quot;&gt;&lt;del&gt;SERVER-74200&lt;/del&gt;&lt;/a&gt;  Implement the 2-phase oplog notification in CreateCollectionCoordinator&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/521b53af47740717ac61a6df38ec2f17eba26c2c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/521b53af47740717ac61a6df38ec2f17eba26c2c&lt;/a&gt;&lt;/p&gt;</comment>
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