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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-76973] Customers still able to drop shard key index in older server versions</title>
                <link>https://jira.mongodb.org/browse/SERVER-76973</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After discussing this issue with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=garaudy.etienne%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;garaudy.etienne@mongodb.com&quot;&gt;garaudy.etienne@mongodb.com&lt;/a&gt;, I&apos;m opening this ticket to request a backport of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6491&quot; title=&quot;Prevent dropping shard key index when alternative index doesn&amp;#39;t exist&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6491&quot;&gt;&lt;del&gt;SERVER-6491&lt;/del&gt;&lt;/a&gt; to older versions of Mongo, 4.4 and up if possible, considering there may be a number of customers with extensions as we go through the EOL process for these versions.&lt;/p&gt;

&lt;p&gt;My customer was able to drop a shard key in production on Shard-0 causing a long queue of deletion tasks resulting in performance degradation. The customer eventually scaled up to allow for additional headroom for the deletions to catch up once the index was rebuilt. Additional context is available in the ticket linked. Their server version at the time was 4.4.18.&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2336582">SERVER-76973</key>
            <summary>Customers still able to drop shard key index in older server versions</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-sharding-nyc">[DO NOT USE] Backlog - Sharding NYC</assignee>
                                    <reporter username="simon.jacobs@mongodb.com">Simon Jacobs</reporter>
                        <labels>
                            <label>indexes</label>
                            <label>shard-key</label>
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                <created>Wed, 10 May 2023 02:41:38 +0000</created>
                <updated>Fri, 9 Jun 2023 15:15:04 +0000</updated>
                            <resolved>Fri, 9 Jun 2023 15:10:36 +0000</resolved>
                                    <version>4.4.18</version>
                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5488265" author="max.hirschhorn@10gen.com" created="Fri, 9 Jun 2023 15:15:04 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=simon.jacobs%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;simon.jacobs@mongodb.com&quot;&gt;simon.jacobs@mongodb.com&lt;/a&gt;, safely backporting the work to MongoDB 5.0 depended on the work in PM-1965 to adding certain synchronization for DDL operations in sharded clusters. It isn&apos;t possible to do the same on the 4.4 branch for that reason.&lt;/p&gt;</comment>
                            <comment id="5488256" author="JIRAUSER1261127" created="Fri, 9 Jun 2023 15:11:20 +0000"  >&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=r.scott%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;r.scott@mongodb.com&quot;&gt;r.scott@mongodb.com&lt;/a&gt;, feasible that it will be backported to 4.4 eventually or not given that EOL is approaching?&lt;/p&gt;</comment>
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