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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-60577] Add logic to check time-series buckets for mixed-schema data at index time</title>
                <link>https://jira.mongodb.org/browse/SERVER-60577</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Users that upgrade from earlier versions of the server may contain mixed-schema data in their time-series buckets. As long as the catalog flag that indicates whether a time-series bucket may contain mixed-schema data is set to &lt;tt&gt;true&lt;/tt&gt;, we need to validate all the buckets when trying to index time-series measurements.&lt;/p&gt;

&lt;p&gt;There are two possible outcomes:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;There are no buckets containing mixed-schema data. We set the catalog flag to &lt;tt&gt;false&lt;/tt&gt; and subsequent index builds do not have to perform any validation on the buckets.&lt;/li&gt;
	&lt;li&gt;There is at least one bucket containing mixed-schema data. The index build will fail in this case. We&apos;ll also provide a list of options for migrating the time-series buckets to a format that does not contain problematic mixed-schema data.&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="1894022">SERVER-60577</key>
            <summary>Add logic to check time-series buckets for mixed-schema data at index time</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="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Oct 2021 18:24:29 +0000</created>
                <updated>Sun, 29 Oct 2023 21:47:35 +0000</updated>
                            <resolved>Sat, 30 Oct 2021 01:56:46 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4158626" author="xgen-internal-githook" created="Sat, 30 Oct 2021 01:38:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60577&quot; title=&quot;Add logic to check time-series buckets for mixed-schema data at index time&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60577&quot;&gt;&lt;del&gt;SERVER-60577&lt;/del&gt;&lt;/a&gt; Add logic to check time-series buckets for mixed-schema data at index time&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8b405630fc1506abf620aaf4b08363d015327c9b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8b405630fc1506abf620aaf4b08363d015327c9b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4158625" author="xgen-internal-githook" created="Sat, 30 Oct 2021 01:38:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60577&quot; title=&quot;Add logic to check time-series buckets for mixed-schema data at index time&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60577&quot;&gt;&lt;del&gt;SERVER-60577&lt;/del&gt;&lt;/a&gt; Add functionality to detect mixed-schema data in time-series bucket collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2455e1c112c89a3bdde41d718cadf7f9cc9b5bf0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2455e1c112c89a3bdde41d718cadf7f9cc9b5bf0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4113728" author="JIRAUSER1258161" created="Fri, 8 Oct 2021 18:47:46 +0000"  >&lt;p&gt;As a brief note, it looks like the right place to plug in and add this logic is&#160;&lt;font color=&quot;#172b4d&quot;&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/catalog/index_catalog_impl.cpp#L1470&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, prior to filtering. That said, we&apos;ll have to check that every insert path funnels through here, and there isn&apos;t some earlier filtering step in some cases.&lt;/font&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                            <outwardlinks description="causes">
                                        <issuelink>
            <issuekey id="2126369">SERVER-69264</issuekey>
        </issuelink>
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                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1912278">SERVER-61070</issuekey>
        </issuelink>
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