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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-18352] Prevent shards that are in the process of being removed from accepting new chunks</title>
                <link>https://jira.mongodb.org/browse/SERVER-18352</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The balancer already won&apos;t choose a shard that is &apos;draining&apos; as the target of any migrations, but if there was already a migration in flight or if a user manually runs moveChunk, the shard will accept and complete the moveChunk operation even while it is draining.&lt;/p&gt;</description>
                <environment></environment>
        <key id="202549">SERVER-18352</key>
            <summary>Prevent shards that are in the process of being removed from accepting new chunks</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="9">Done</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Wed, 6 May 2015 20:06:10 +0000</created>
                <updated>Thu, 7 Mar 2019 17:05:09 +0000</updated>
                            <resolved>Thu, 7 Mar 2019 17:05:09 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2174672" author="kaloian.manassiev" created="Thu, 7 Mar 2019 17:05:09 +0000"  >&lt;p&gt;Starting in version 3.4, where the balancer runs on the config server primary, this is no longer a problem.&lt;/p&gt;

&lt;p&gt;The manual &lt;tt&gt;moveChunk&lt;/tt&gt; command &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ca69cd4a88a7fb5073ee1fa6f2b70d3bbecd88f8/src/mongo/db/s/balancer/balancer.cpp#L274&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;checks&lt;/a&gt; whether the requested destination shard is a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ca69cd4a88a7fb5073ee1fa6f2b70d3bbecd88f8/src/mongo/db/s/balancer/balancer_policy.cpp#L227&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;suitable receiver&lt;/a&gt; and if the shard is draining, the move will fail.&lt;/p&gt;</comment>
                            <comment id="906861" author="spencer" created="Wed, 6 May 2015 20:07:23 +0000"  >&lt;p&gt;Relevant &quot;TODO&quot; already in the code: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/v3.0/src/mongo/s/commands_admin.cpp#L1435-L1437&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/v3.0/src/mongo/s/commands_admin.cpp#L1435-L1437&lt;/a&gt;&lt;/p&gt;</comment>
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