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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-28841] CollectionShardingState / ScopedCollectionMetadata destructor races</title>
                <link>https://jira.mongodb.org/browse/SERVER-28841</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are numerous races of various sorts around destruction of MetadataManager and ScopedCollectionMetadata objects.  Fixing them requires changes to ScopedCollectionMetadata and CollectionMetadataTracker layout, and locking in the MetadataManager destructor.&lt;/p&gt;

&lt;p&gt;Reproduce by running jstests/sharding/cleanup_orphaned_cmd_during_movechunk.js and jstests/concurrency/fsm_all_simultaneous repeatedly.&lt;/p&gt;</description>
                <environment></environment>
        <key id="375131">SERVER-28841</key>
            <summary>CollectionShardingState / ScopedCollectionMetadata destructor races</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="13201">Fixed</resolution>
                                        <assignee username="nathan.myers">Nathan Myers</assignee>
                                    <reporter username="nathan.myers">Nathan Myers</reporter>
                        <labels>
                    </labels>
                <created>Tue, 18 Apr 2017 15:45:00 +0000</created>
                <updated>Mon, 30 Oct 2023 23:17:24 +0000</updated>
                            <resolved>Tue, 16 May 2017 20:56:30 +0000</resolved>
                                    <version>3.4.0</version>
                    <version>3.5.7</version>
                                    <fixVersion>3.4.5</fixVersion>
                    <fixVersion>3.5.8</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1575548" author="xgen-internal-githook" created="Fri, 19 May 2017 16:23:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;nathan-myers-mongo&apos;, u&apos;name&apos;: u&apos;Nathan Myers&apos;, u&apos;email&apos;: u&apos;nathan.myers@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28841&quot; title=&quot;CollectionShardingState / ScopedCollectionMetadata destructor races&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28841&quot;&gt;&lt;del&gt;SERVER-28841&lt;/del&gt;&lt;/a&gt; (BF) untangle spurious shared-library dependency&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b06c6e96c39e2eb700c40b44bd9450bee29de1a3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b06c6e96c39e2eb700c40b44bd9450bee29de1a3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1575046" author="nathan.myers" created="Thu, 18 May 2017 23:52:52 +0000"  >&lt;p&gt;Corresponding data structure simplifications were folded into 3.5, which do not affect correctness, but improve maintainability.&lt;/p&gt;</comment>
                            <comment id="1575038" author="xgen-internal-githook" created="Thu, 18 May 2017 23:33:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;nathan-myers-mongo&apos;, u&apos;name&apos;: u&apos;Nathan Myers&apos;, u&apos;email&apos;: u&apos;nathan.myers@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28841&quot; title=&quot;CollectionShardingState / ScopedCollectionMetadata destructor races&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28841&quot;&gt;&lt;del&gt;SERVER-28841&lt;/del&gt;&lt;/a&gt; (forward-port) simpler CollectionMetadata lifetime management&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3e3c1c44f36a6121ca707e7d9700f9a5689a1c25&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3e3c1c44f36a6121ca707e7d9700f9a5689a1c25&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1572765" author="xgen-internal-githook" created="Tue, 16 May 2017 20:52:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;nathan-myers-mongo&apos;, u&apos;name&apos;: u&apos;Nathan Myers&apos;, u&apos;email&apos;: u&apos;nathan.myers@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28841&quot; title=&quot;CollectionShardingState / ScopedCollectionMetadata destructor races&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28841&quot;&gt;&lt;del&gt;SERVER-28841&lt;/del&gt;&lt;/a&gt; Fix ScopedCollectionMetadata destructor races&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4db4a7cc7d73c77feb7e5d7c81533c026296f54c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4db4a7cc7d73c77feb7e5d7c81533c026296f54c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1553760" author="nathan.myers" created="Thu, 20 Apr 2017 16:02:53 +0000"  >&lt;p&gt;This improvement can be forward-ported to 3.5 to simplify its code.&lt;/p&gt;</comment>
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