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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-76805] Granularity field automatically added to manually-created time-series buckets collections on v6.1- but not v6.2+</title>
                <link>https://jira.mongodb.org/browse/SERVER-76805</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Consider manually creating a time-series buckets collection with options {&lt;tt&gt;timeField: &quot;t&quot;&lt;/tt&gt;}. After &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67598&quot; title=&quot;Allow create command to set bucketMaxSpanSeconds and bucketRoundingSeconds directly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67598&quot;&gt;&lt;del&gt;SERVER-67598&lt;/del&gt;&lt;/a&gt; (i.e. as of v6.2), the requested buckets collection will get created with these exact options as specified. However, before &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67598&quot; title=&quot;Allow create command to set bucketMaxSpanSeconds and bucketRoundingSeconds directly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67598&quot;&gt;&lt;del&gt;SERVER-67598&lt;/del&gt;&lt;/a&gt; (i.e. before v6.2), when issuing this same command it will automatically by transformed to {&lt;tt&gt;timeField: &quot;t&quot;, granularity: &quot;seconds&quot;&lt;/tt&gt;}. This is because in the IDL definition of the time-series options, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/54d160ce3102516074bcfad081f84308f1dea8ef/src/mongo/db/timeseries/timeseries.idl#L130&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the granularity field is now considered optional&lt;/a&gt; whereas &lt;a href=&quot;https://github.com/mongodb/mongo/blob/84e93642a6d7f52ae2df506cff0df2679f526a2c/src/mongo/db/timeseries/timeseries.idl#L109&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;previously it was considered non-optional with a default value of &quot;seconds&quot; if not explicitly specified&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;In either case the collection should functionally be the same (since &quot;seconds&quot; is the default behavior), however now consider the scenario where a mixed-version replica set is running with a primary node on version v6.2 (or v6.3 or v7.0) and a secondary node on version v6.1 (or v6.0). The primary node will create the collection and replicate the operation without the granularity in the collection options. However, the secondary node will implicitly add the granularity when applying the oplog entry. This means that the exact catalog entry for this collection will differ between the two nodes; it will explicitly have the granularity specified on one node and it will be excluded on the other node.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2331319">SERVER-76805</key>
            <summary>Granularity field automatically added to manually-created time-series buckets collections on v6.1- but not v6.2+</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="gregory.noma@mongodb.com">Gregory Noma</reporter>
                        <labels>
                            <label>former-storex-namer</label>
                            <label>mongosync</label>
                    </labels>
                <created>Wed, 3 May 2023 18:45:18 +0000</created>
                <updated>Fri, 10 Nov 2023 14:19:50 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>3</watches>
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            <issuekey id="2496684">SERVER-83114</issuekey>
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