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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-65439] Tenant Migration oplog applier may try to wrongly mark an index as multikey.</title>
                <link>https://jira.mongodb.org/browse/SERVER-65439</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After writing the record to collection table, we index records. While indexing records, we&#160;&lt;a href=&quot;https://github.com/10gen/mongo/blob/57b670b4df8b5ad731306a811500b46c9e71a0e9/src/mongo/db/catalog/index_catalog_impl.cpp#L1575-L1591&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;track any index keys&lt;/a&gt;&#160;that needs to be marked as multikey in the&#160;&lt;tt&gt;_mdb_catlog&lt;/tt&gt;&#160;table for that collection, via opCtx decoration. And, we don&apos;t reset the tracker after&#160;&lt;a href=&quot;https://github.com/10gen/mongo/blob/57b670b4df8b5ad731306a811500b46c9e71a0e9/src/mongo/db/catalog/index_catalog_impl.cpp#L1625&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;marking the index as multi-key&lt;/a&gt;&#160;in the collection catalog entry. So, if write ops on different collection shares the same opCtx, we might wrongly mark an index as multi-key for a collection if the index keys of that collection has the same name as the multikey index name of the previously applied collection operation.&lt;/p&gt;

&lt;p&gt;In tenant oplog applier case, write ops on different collection that&apos;s get applied by the same&#160;&lt;tt&gt;TenantMigrationWriter&lt;/tt&gt;&#160;thread in a single batch, will share the&#160;&lt;a href=&quot;https://github.com/10gen/mongo/blob/57b670b4df8b5ad731306a811500b46c9e71a0e9/src/mongo/db/repl/tenant_oplog_applier.cpp#L1025-L1045&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;same opCtx&lt;/a&gt;. This can lead either to tenant migration failure due to &lt;a href=&quot;https://github.com/10gen/mongo/blob/57b670b4df8b5ad731306a811500b46c9e71a0e9/src/mongo/db/catalog/index_catalog_impl.cpp#L1620&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; error or  silently marking a wrong index as mutikey on recipient primary.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2022047">SERVER-65439</key>
            <summary>Tenant Migration oplog applier may try to wrongly mark an index as multikey.</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="christopher.caplinger@mongodb.com">Christopher Caplinger</assignee>
                                    <reporter username="suganthi.mani@mongodb.com">Suganthi Mani</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 Apr 2022 14:33:28 +0000</created>
                <updated>Sun, 29 Oct 2023 21:39:41 +0000</updated>
                            <resolved>Fri, 22 Apr 2022 14:04:26 +0000</resolved>
                                                    <fixVersion>6.0.0-rc4</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4519848" author="xgen-internal-githook" created="Mon, 2 May 2022 14:35:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Christopher Caplinger&apos;, &apos;email&apos;: &apos;christopher.caplinger@mongodb.com&apos;, &apos;username&apos;: &apos;UnicodeSnowman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65439&quot; title=&quot;Tenant Migration oplog applier may try to wrongly mark an index as multikey.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65439&quot;&gt;&lt;del&gt;SERVER-65439&lt;/del&gt;&lt;/a&gt;: Conditionally set multikey paths when indexing records&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 51b92630cc5a6448de092c1c6a38c70d702c5153)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bf5b9ae54fdb8ee506205d624b561bb94e7691a4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bf5b9ae54fdb8ee506205d624b561bb94e7691a4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4498275" author="xgen-internal-githook" created="Thu, 21 Apr 2022 20:15:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Christopher Caplinger&apos;, &apos;email&apos;: &apos;christopher.caplinger@mongodb.com&apos;, &apos;username&apos;: &apos;UnicodeSnowman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65439&quot; title=&quot;Tenant Migration oplog applier may try to wrongly mark an index as multikey.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65439&quot;&gt;&lt;del&gt;SERVER-65439&lt;/del&gt;&lt;/a&gt;: Conditionally set multikey paths when indexing records&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/51b92630cc5a6448de092c1c6a38c70d702c5153&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/51b92630cc5a6448de092c1c6a38c70d702c5153&lt;/a&gt;&lt;/p&gt;</comment>
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