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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-66745] POC - Take change collection lock at AutoGetCollection</title>
                <link>https://jira.mongodb.org/browse/SERVER-66745</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This POC was about introducing a way to lock the change collection before entering the timestamped unit of work.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Essentially taking the change collection lock within the AutoGetChangeCollection().&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;The POC work is here: &lt;a href=&quot;https://spruce.mongodb.com/version/62895d357742ae5ac3399275/changes?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://spruce.mongodb.com/version/62895d357742ae5ac3399275/changes?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Ultimately, it was decided to not go with this path as this solution is prone to deadlocks and is difficult to debug.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;An alternate suggestion has been proposed here: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66715&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-66715&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2054578">SERVER-66745</key>
            <summary>POC - Take change collection lock at AutoGetCollection</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="13201">Fixed</resolution>
                                        <assignee username="rishab.joshi@mongodb.com">Rishab Joshi</assignee>
                                    <reporter username="rishab.joshi@mongodb.com">Rishab Joshi</reporter>
                        <labels>
                            <label>pm-2334-m1</label>
                    </labels>
                <created>Wed, 25 May 2022 09:43:58 +0000</created>
                <updated>Sun, 29 Oct 2023 21:37:47 +0000</updated>
                            <resolved>Wed, 25 May 2022 09:45:54 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4571637" author="JIRAUSER1257558" created="Wed, 25 May 2022 09:45:54 +0000"  >&lt;p&gt;The POC work and decision is available in the description of this ticket.&lt;/p&gt;</comment>
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