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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-34896] Using index builder on primaries does not timestamp index build completion</title>
                <link>https://jira.mongodb.org/browse/SERVER-34896</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Typically indexes on primaries are built via a user command. However there are a few instances where index builds can complete on a node that identifies as a primary, but managed by the &lt;tt&gt;IndexBuilder&lt;/tt&gt; class. Specifically:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Primary catchup&lt;/li&gt;
	&lt;li&gt;Primary drain&lt;/li&gt;
	&lt;li&gt;Started on a secondary, but complete after a step-up&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/db41862c5380ab33cf28db99726cdac252df0872/src/mongo/db/catalog/index_create_impl.cpp#L90-L92&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Primaries (and other states)&lt;/a&gt;&#160;do not timestamp index completion. For primaries, it was expected that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/db41862c5380ab33cf28db99726cdac252df0872/src/mongo/db/commands/create_indexes.cpp#L386-L397&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;committing the index build writes an oplog entry&lt;/a&gt;, timestamping the transaction.&lt;/p&gt;

&lt;p&gt;Instead, consider having callers of &lt;a href=&quot;https://github.com/mongodb/mongo/blob/db41862c5380ab33cf28db99726cdac252df0872/src/mongo/db/catalog/index_create_impl.h#L169&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;MultiIndexBlock&lt;/tt&gt;&lt;/a&gt; manage timestamping the write.&lt;/p&gt;</description>
                <environment></environment>
        <key id="541072">SERVER-34896</key>
            <summary>Using index builder on primaries does not timestamp index build completion</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Tue, 8 May 2018 19:29:06 +0000</created>
                <updated>Sun, 29 Oct 2023 22:31:58 +0000</updated>
                            <resolved>Mon, 14 May 2018 15:16:03 +0000</resolved>
                                                    <fixVersion>4.0.0-rc0</fixVersion>
                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1890478" author="xgen-internal-githook" created="Mon, 14 May 2018 15:10:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;, &apos;username&apos;: &apos;dgottlieb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34896&quot; title=&quot;Using index builder on primaries does not timestamp index build completion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34896&quot;&gt;&lt;del&gt;SERVER-34896&lt;/del&gt;&lt;/a&gt;: Move timestamping responsibility on index completion to callers.&lt;/p&gt;

&lt;p&gt;Previously, `MultiIndexBlockImpl` would use member state as a proxy for whether&lt;br/&gt;
an index build originated from a `createIndexes` command. This information was&lt;br/&gt;
used to determine if the completion of the index needed to be explicitly&lt;br/&gt;
timestamped, or whether an oplog entry would timestamp the write.&lt;/p&gt;

&lt;p&gt;However, nodes in a primary state can build indexes during primary &quot;catch-up&quot;&lt;br/&gt;
or &quot;drain&quot;. Those index builds originated from an oplog entry and thus will not&lt;br/&gt;
generate one on completion. These index builds need to be explicitly&lt;br/&gt;
timestamped.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8e27c2b49ba17fe9b02695efb29a6322b56c2f23&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8e27c2b49ba17fe9b02695efb29a6322b56c2f23&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="674855">SERVER-39085</issuekey>
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