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    <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-50144] Removing a shard with in-progress migration coordinators can leave permanently pending config.rangeDeletions document on recipient</title>
                <link>https://jira.mongodb.org/browse/SERVER-50144</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The following scenario can occur:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Migration of a chunk from shard X to shard Y completes with commit/abort and the migration coordinator on shard X persists the decision&lt;/li&gt;
	&lt;li&gt;Shard X is removed and shut down before the migration coordinator updates config.rangeDeletions on shard Y&lt;/li&gt;
	&lt;li&gt;Shard Y is left with document in config.rangeDeletions corresponding to that migration with a &apos;pending: true&apos; flag&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;The presence of this document will permanently prevent any migrations to shard Y for chunks overlapping this chunk.&lt;/p&gt;

&lt;p&gt;In the case where the migration aborted after migrating some documents to shard Y, this will also leave documents in this chunk orphaned on shard Y.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1433631">SERVER-50144</key>
            <summary>Removing a shard with in-progress migration coordinators can leave permanently pending config.rangeDeletions document on recipient</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="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                            <label>bkp</label>
                            <label>oldshardingemea</label>
                    </labels>
                <created>Thu, 6 Aug 2020 15:44:16 +0000</created>
                <updated>Thu, 26 Oct 2023 10:17:56 +0000</updated>
                                                                            <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="3349297" author="matthew.saltz" created="Thu, 20 Aug 2020 15:14:20 +0000"  >&lt;p&gt;This ticket should also re-enable checking for orphaned documents at the end of shard_removal_triggers_catalog_cache_invalidation.js, which will be removed as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49713&quot; title=&quot;Skip checking for orphaned documents in shard_removal_triggers_catalog_cache_invalidation.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49713&quot;&gt;&lt;del&gt;SERVER-49713&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1965197">SERVER-62691</issuekey>
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            <issuekey id="1433619">SERVER-50143</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1433737">SERVER-50146</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1900585">SERVER-60767</issuekey>
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            <issuekey id="1911574">SERVER-61055</issuekey>
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