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    <title>MongoDB Jira</title>
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    <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>[DOCS-14120] Investigate changes in SERVER-48980: Associate ServiceExecutors with Clients</title>
                <link>https://jira.mongodb.org/browse/DOCS-14120</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    In currentOp, each external client entry will now have a boolean field &quot;threaded&quot; that describes if it is eligible to occupy a dedicated thread for service execution/ingress networking. Note that it may not yet have occupied said thread but is expected to for the following operation.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    &lt;tt&gt;ServiceExecutors&lt;/tt&gt; are executors: asynchronous task queues processed by one or more threads. When the &lt;tt&gt;ServiceStateMachine&lt;/tt&gt; needs to queue a new iteration of the command loop, the schedule that work onto a &lt;tt&gt;ServiceExecutor&lt;/tt&gt; (see &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ba3e5964f9ac140723df5b8a012306b30a1cb5b9/src/mongo/transport/service_state_machine.cpp#L613&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;). For normal users, all executors are either the &lt;tt&gt;ServiceExecutorSynchronous&lt;/tt&gt; or the &lt;tt&gt;ServiceExecutorReserved&lt;/tt&gt; (which is set &lt;a href=&quot;https://github.com/mongodb/mongo/blob/451dcf99afb7a67e9a5b849e846391402b5928c9/src/mongo/transport/service_entry_point_impl.cpp#L172&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;We want to allow each &lt;tt&gt;Client&lt;/tt&gt; to have its own &lt;tt&gt;ServiceExecutor&lt;/tt&gt; pointer as a mutable member. Importantly, each &lt;tt&gt;Client&lt;/tt&gt; does not own their &lt;tt&gt;ServiceExecutor&lt;/tt&gt;. We expect that a command or the even &lt;tt&gt;ServiceStateMachine&lt;/tt&gt; might change which executor a client is associated with. Once this is done, we want to remove the &lt;tt&gt;ServiceExecutor&lt;/tt&gt; associated with the &lt;tt&gt;ServiceStateMachine&lt;/tt&gt; (see &lt;a href=&quot;https://github.com/mongodb/mongo/blob/44d5d24716c508c5854d32c5dc6ec9e0a4ee95c8/src/mongo/transport/service_state_machine.h#L235&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) and use the client&apos;s wherever it would be used.&lt;/p&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="1589215">DOCS-14120</key>
            <summary>Investigate changes in SERVER-48980: Associate ServiceExecutors with Clients</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Wed, 13 Jan 2021 20:03:07 +0000</created>
                <updated>Mon, 13 Nov 2023 17:59:59 +0000</updated>
                                                            <fixVersion>4.7.0</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4940350" author="edu.bot" created="Mon, 31 Oct 2022 16:03:59 +0000"  >&lt;p&gt;Hello! This ticket has been closed due to inactivity. If you believe this ticket is still important, please reopen it and leave a comment to explain why. Thank you!&lt;/p&gt;</comment>
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