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    <title>MongoDB Jira</title>
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    <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-62691] Remove shard does not wait for migrations to finish on the drained shard</title>
                <link>https://jira.mongodb.org/browse/SERVER-62691</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The removeShard command is only checking locally in the config server &lt;a href=&quot;https://github.com/mongodb/mongo/blob/62dcce62e7be38f9637cdd967070713ebfa6aaa5/src/mongo/db/s/config/sharding_catalog_manager_shard_operations.cpp#L910-L932&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;if the removed shard does not own any more chunks&lt;/a&gt;, however, this check can pass right after the latest migration &lt;a href=&quot;https://github.com/mongodb/mongo/blob/62dcce62e7be38f9637cdd967070713ebfa6aaa5/src/mongo/db/s/migration_source_manager.cpp#L469-L475&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;commits the chunk on the config server&lt;/a&gt;, but has not finished the cleanup, meaning that important persistency cleanup tasks like &lt;a href=&quot;https://github.com/mongodb/mongo/blob/62dcce62e7be38f9637cdd967070713ebfa6aaa5/src/mongo/db/s/migration_coordinator.cpp#L188-L262&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;starting the donor shard range deletion, removing the recipient shard&apos;s range deletion document document&lt;/a&gt; and even &lt;a href=&quot;https://github.com/mongodb/mongo/blob/62dcce62e7be38f9637cdd967070713ebfa6aaa5/src/mongo/db/s/migration_coordinator.cpp#L183&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;removing the coordinator document&lt;/a&gt;, might never be executed if a user shuts down the shard immediately after receiving a successful result of a removeShard command.&lt;/p&gt;

&lt;p&gt;Remove shard should check with the draining shard if all migrations are finished and successful.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1965197">SERVER-62691</key>
            <summary>Remove shard does not wait for migrations to finish on the drained shard</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-sharding-emea">[DO NOT USE] Backlog - Sharding EMEA</assignee>
                                    <reporter username="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</reporter>
                        <labels>
                    </labels>
                <created>Mon, 17 Jan 2022 12:53:33 +0000</created>
                <updated>Tue, 6 Dec 2022 00:39:14 +0000</updated>
                            <resolved>Tue, 18 Jan 2022 15:17:13 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4297599" author="marcos.grillo" created="Tue, 18 Jan 2022 15:16:41 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=esha.maharishi&quot; class=&quot;user-hover&quot; rel=&quot;esha.maharishi&quot;&gt;esha.maharishi&lt;/a&gt; yes, it is the same as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50144&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;SERVER-50144&lt;/a&gt;, I&apos;ll mark it as a duplicate.&lt;/p&gt;</comment>
                            <comment id="4297349" author="esha.maharishi@10gen.com" created="Tue, 18 Jan 2022 14:13:38 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=marcos.grillo&quot; class=&quot;user-hover&quot; rel=&quot;marcos.grillo&quot;&gt;marcos.grillo&lt;/a&gt;, just a heads up that this may be a dupe of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50144&quot; title=&quot;Removing a shard with in-progress migration coordinators can leave permanently pending config.rangeDeletions document on recipient&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50144&quot;&gt;SERVER-50144&lt;/a&gt; and/or &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50146&quot; title=&quot;Removing a shard with &amp;#39;uncommitted&amp;#39; documents in config.rangeDeletions on migration recipient can lead to incomplete state on donor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50146&quot;&gt;SERVER-50146&lt;/a&gt;.&lt;/p&gt;</comment>
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