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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-24467] Make the shard-side implementation of &apos;moveChunk&apos; joinable</title>
                <link>https://jira.mongodb.org/browse/SERVER-24467</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, if the caller of the shard &lt;tt&gt;moveChunk&lt;/tt&gt; command closes the connection for any reason, the chunk move operation will continue running in the background. If the same &lt;tt&gt;moveChunk&lt;/tt&gt; command is retried though, the shard will return a &lt;tt&gt;ConflictingOperationInProgress&lt;/tt&gt; error.&lt;/p&gt;

&lt;p&gt;We should make the sharded &apos;moveChunk&apos; operation joinable so that if a moveChunk command with exactly the same arguments is invoked it will block waiting for the already active moveChunk to complete.&lt;/p&gt;</description>
                <environment></environment>
        <key id="292417">SERVER-24467</key>
            <summary>Make the shard-side implementation of &apos;moveChunk&apos; joinable</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Wed, 8 Jun 2016 14:46:06 +0000</created>
                <updated>Thu, 14 Jul 2016 15:58:23 +0000</updated>
                            <resolved>Mon, 13 Jun 2016 21:03:17 +0000</resolved>
                                                    <fixVersion>3.3.9</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1292791" author="xgen-internal-githook" created="Mon, 13 Jun 2016 20:55:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24467&quot; title=&quot;Make the shard-side implementation of &amp;#39;moveChunk&amp;#39; joinable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24467&quot;&gt;&lt;del&gt;SERVER-24467&lt;/del&gt;&lt;/a&gt; Make the shard implementation of &apos;moveChunk&apos; joinable&lt;/p&gt;

&lt;p&gt;This change makes the shard implementation of the &apos;moveChunk&apos; command join&lt;br/&gt;
a currently running migration if that migration has exactly the same&lt;br/&gt;
arguments as the call. This allows retriability of this command by the&lt;br/&gt;
balancer.&lt;/p&gt;

&lt;p&gt;In addition, it makes the moveChunk command report success if the&lt;br/&gt;
specified chunk is already located on the desired destination shard.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3b7177d627a7a63b98b3717d982e323457267e12&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3b7177d627a7a63b98b3717d982e323457267e12&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1292614" author="xgen-internal-githook" created="Mon, 13 Jun 2016 19:19:35 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24467&quot; title=&quot;Make the shard-side implementation of &amp;#39;moveChunk&amp;#39; joinable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24467&quot;&gt;&lt;del&gt;SERVER-24467&lt;/del&gt;&lt;/a&gt; Move active migrations tracking to separate class&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9fd6bc9fb1a9321447efa964b7568da740b23bcf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9fd6bc9fb1a9321447efa964b7568da740b23bcf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1292613" author="xgen-internal-githook" created="Mon, 13 Jun 2016 19:19:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24467&quot; title=&quot;Make the shard-side implementation of &amp;#39;moveChunk&amp;#39; joinable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24467&quot;&gt;&lt;del&gt;SERVER-24467&lt;/del&gt;&lt;/a&gt; Add assert.commandWorked to unit-tests&lt;/p&gt;

&lt;p&gt;Also makes them &apos;use strict&apos;.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4649ed8d47ac507d195d9fb4204f1cfa40e4e363&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4649ed8d47ac507d195d9fb4204f1cfa40e4e363&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1292612" author="xgen-internal-githook" created="Mon, 13 Jun 2016 19:19:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24467&quot; title=&quot;Make the shard-side implementation of &amp;#39;moveChunk&amp;#39; joinable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24467&quot;&gt;&lt;del&gt;SERVER-24467&lt;/del&gt;&lt;/a&gt; Make MoveChunkRequest and dependencies comparable&lt;/p&gt;

&lt;p&gt;This change implements the &apos;==&apos; operator on MoveChunkRequest and any&lt;br/&gt;
dependent classes which do not have it.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/97ad19ed5bc71835e9783b932411b0ea9f83d572&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/97ad19ed5bc71835e9783b932411b0ea9f83d572&lt;/a&gt;&lt;/p&gt;</comment>
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