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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-63837] Concurrent index build and rename over sharded collections may disrupt CRUD operations</title>
                <link>https://jira.mongodb.org/browse/SERVER-63837</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Provided that it should not be common to build an index over a sharded collection while the latter is being renamed, it is technically possible to do so.&lt;/p&gt;

&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/06124a018dd1c6abed0fbda003d214f1c34ece7b/src/mongo/db/catalog/rename_collection.cpp#L121&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;check for concurrent index builds&lt;/a&gt; happens in the local catalog rename code, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/06124a018dd1c6abed0fbda003d214f1c34ece7b/src/mongo/db/s/rename_collection_participant_service.cpp#L125&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;called&lt;/a&gt; by rename participants after &lt;a href=&quot;https://github.com/mongodb/mongo/blob/06124a018dd1c6abed0fbda003d214f1c34ece7b/src/mongo/db/s/rename_collection_participant_service.cpp#L302-L310&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;blocking CRUDs&lt;/a&gt;. If the two operations overlap, an assertion is thrown and the participant indefinitely retries the rename operation as long as the build is not finished.&lt;/p&gt;

&lt;p&gt;As a consequence, if an index build happens during a rename it is possible that CRUDs are blocked during the whole time of the build.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1986456">SERVER-63837</key>
            <summary>Concurrent index build and rename over sharded collections may disrupt CRUD operations</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-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Fri, 18 Feb 2022 16:47:15 +0000</created>
                <updated>Thu, 26 Oct 2023 13:15:15 +0000</updated>
                                            <version>5.3.0-rc0</version>
                    <version>5.0.5</version>
                    <version>5.2.1</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4373815" author="JIRAUSER1263826" created="Thu, 24 Feb 2022 11:17:39 +0000"  >&lt;p&gt;This is not a correctness bug but rather an availability issue, which we will address under the project. &lt;/p&gt;</comment>
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