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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-77131] Remove and ban any write to collection instance in commit handlers</title>
                <link>https://jira.mongodb.org/browse/SERVER-77131</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It is not safe to write to collection or index catalog entry instances in commit handlers. Cloned instances as part of DDL operations can be returned to other threads doing lock-free reads after the DDL operation is committed to the storage engine but before its commit handlers have run. Any such write requires synchronization and goes against the design philosophy that readers should obtain immutable instances that are fully in sync with the opened storage snapshot.&lt;/p&gt;

&lt;p&gt;To help find and prevent future misuse we should consider publishing new collection instances in the first commit handler rather than the last.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2341120">SERVER-77131</key>
            <summary>Remove and ban any write to collection instance in commit handlers</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="13201">Fixed</resolution>
                                        <assignee username="henrik.edin@mongodb.com">Henrik Edin</assignee>
                                    <reporter username="henrik.edin@mongodb.com">Henrik Edin</reporter>
                        <labels>
                    </labels>
                <created>Mon, 15 May 2023 15:07:29 +0000</created>
                <updated>Sun, 29 Oct 2023 21:21:30 +0000</updated>
                            <resolved>Wed, 11 Oct 2023 20:41:31 +0000</resolved>
                                                    <fixVersion>7.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5770863" author="xgen-internal-githook" created="Wed, 11 Oct 2023 15:56:13 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;, &apos;username&apos;: &apos;henrikedin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77131&quot; title=&quot;Remove and ban any write to collection instance in commit handlers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77131&quot;&gt;&lt;del&gt;SERVER-77131&lt;/del&gt;&lt;/a&gt; Removed dropped flag on IndexCatalogEntry&lt;/p&gt;

&lt;p&gt;An index that is marked ready in the index catalog can no longer be marked as dropped.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2bd245299ad0e006dd9f5971169412b000959f40&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2bd245299ad0e006dd9f5971169412b000959f40&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5598747" author="xgen-internal-githook" created="Fri, 28 Jul 2023 15:48:03 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77131&quot; title=&quot;Remove and ban any write to collection instance in commit handlers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77131&quot;&gt;&lt;del&gt;SERVER-77131&lt;/del&gt;&lt;/a&gt; Remove write to index entry instance in IndexRemoveChange commit handler&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5944235d7cd94eb59a34c97374977d00ffb2edb5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5944235d7cd94eb59a34c97374977d00ffb2edb5&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2338804">SERVER-77062</issuekey>
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            <issuekey id="2447970">SERVER-81297</issuekey>
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