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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-67218] Remove ServiceStateMachine::setCleanupHook</title>
                <link>https://jira.mongodb.org/browse/SERVER-67218</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This hook allows an arbitrary listener to monitor for &lt;tt&gt;ServiceStateMachine&lt;/tt&gt; cleanup.&lt;br/&gt;
But the only user is &lt;tt&gt;ServiceEntryPointImpl&lt;/tt&gt;, which creates and owns all &lt;tt&gt;ServiceStateMachine&lt;/tt&gt; instances, and already has an &lt;tt&gt;onClientDisconnect&lt;/tt&gt; hook.&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;ServiceStateMachine&lt;/tt&gt; disconnects its &lt;tt&gt;Client&lt;/tt&gt; as part of its cleanup process, and part of this is calling the &lt;tt&gt;ServiceEntryPoint::onClientDisconnect(Client*)&lt;/tt&gt; virtual function AND THEN the installed &lt;tt&gt;_cleanupHook&lt;/tt&gt; if any.&lt;/p&gt;

&lt;p&gt;The Mongod &lt;tt&gt;ServiceEntryPointImpl&lt;/tt&gt; doesn&apos;t override &lt;tt&gt;onClientDisconnect&lt;/tt&gt;, but does install a &lt;tt&gt;ssm.setCleanupHook&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt; &lt;tt&gt;ServiceEntryPointMongos&lt;/tt&gt; is the opposite: it doesn&apos;t install a &lt;tt&gt;ssm.setCleanupHook&lt;/tt&gt; but DOES override &lt;tt&gt;onClientDisconnect&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;If there&apos;s some reason the &lt;tt&gt;onClientDisconnect&lt;/tt&gt; must be followed by a LATER call to the installed &lt;tt&gt;cleanupHook&lt;/tt&gt; we should clearly document that and change the SEP to have two SEP Client cleanup notifications with the same style of API. I suspect that we could probably be able to just combine them under the existing &lt;tt&gt;onClientDisconnect&lt;/tt&gt; callback and remove &lt;tt&gt;ServiceStateMachine::setCleanupHook&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;PM-2766&lt;/p&gt;</description>
                <environment></environment>
        <key id="2066536">SERVER-67218</key>
            <summary>Remove ServiceStateMachine::setCleanupHook</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="billy.donahue@mongodb.com">Billy Donahue</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Sat, 11 Jun 2022 18:59:20 +0000</created>
                <updated>Sun, 29 Oct 2023 21:36:55 +0000</updated>
                            <resolved>Fri, 17 Jun 2022 05:56:21 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4622472" author="xgen-internal-githook" created="Fri, 17 Jun 2022 00:29:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Billy Donahue&apos;, &apos;email&apos;: &apos;billy.donahue@mongodb.com&apos;, &apos;username&apos;: &apos;BillyDonahue&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67218&quot; title=&quot;Remove ServiceStateMachine::setCleanupHook&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67218&quot;&gt;&lt;del&gt;SERVER-67218&lt;/del&gt;&lt;/a&gt; remove SSM::onCleanupHook by changing ServiceEntryPointImpl SSMList data structure&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/912818162a086bd85e578913d90a0c91cd6bfb11&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/912818162a086bd85e578913d90a0c91cd6bfb11&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4613038" author="billy.donahue" created="Mon, 13 Jun 2022 22:26:52 +0000"  >&lt;p&gt;The SEPImpl might affect or even fix BF-22149, for which we have no root cause, but it&apos;s a SSM lifecycle problem.&lt;/p&gt;</comment>
                            <comment id="4611005" author="billy.donahue" created="Mon, 13 Jun 2022 14:16:50 +0000"  >&lt;p&gt;This is preliminary/parallel work to the design doc, reducing the interfaces to SSM.&lt;/p&gt;</comment>
                    </comments>
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                                            <outwardlinks description="related to">
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            <issuekey id="2067484">SERVER-67230</issuekey>
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