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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-16432] Chunk migration data structures not properly synchronized with storage engines that offer document-level locking</title>
                <link>https://jira.mongodb.org/browse/SERVER-16432</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The migrateFromStatus data structure is largely synchronized by the lock on the collection containing the chunk that is currently migrating.  This implementation assumes that modifications of a collection exclusively lock that collection, which is no longer the case for document-level locking storage engines.&lt;/p&gt;</description>
                <environment></environment>
        <key id="172933">SERVER-16432</key>
            <summary>Chunk migration data structures not properly synchronized with storage engines that offer document-level locking</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="1" iconUrl="https://jira.mongodb.org/images/icons/priorities/blocker.svg">Blocker - P1</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="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="schwerin@mongodb.com">Andy Schwerin</reporter>
                        <labels>
                    </labels>
                <created>Fri, 5 Dec 2014 15:59:44 +0000</created>
                <updated>Wed, 24 Dec 2014 17:21:34 +0000</updated>
                            <resolved>Thu, 18 Dec 2014 19:16:38 +0000</resolved>
                                    <version>2.8.0-rc2</version>
                                    <fixVersion>2.8.0-rc4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="789807" author="xgen-internal-githook" created="Thu, 18 Dec 2014 19:12:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16432&quot; title=&quot;Chunk migration data structures not properly synchronized with storage engines that offer document-level locking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16432&quot;&gt;&lt;del&gt;SERVER-16432&lt;/del&gt;&lt;/a&gt; Chunk migration data structures not properly synchronized&lt;/p&gt;

&lt;p&gt;Fix receipient side.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/50dc6dbe394c42d03659aa3410954f1e3ff46740&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/50dc6dbe394c42d03659aa3410954f1e3ff46740&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="786469" author="xgen-internal-githook" created="Mon, 15 Dec 2014 20:48:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16432&quot; title=&quot;Chunk migration data structures not properly synchronized with storage engines that offer document-level locking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16432&quot;&gt;&lt;del&gt;SERVER-16432&lt;/del&gt;&lt;/a&gt; Chunk migration data structures not properly synchronized&lt;/p&gt;

&lt;p&gt;Tighten locking policy for donor side of migration.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ab70613187b0f2c1488a4fe6750b2f51da278afb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ab70613187b0f2c1488a4fe6750b2f51da278afb&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="172866">SERVER-16426</issuekey>
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            <issuekey id="174356">SERVER-16540</issuekey>
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