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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-48980] Associate ServiceExecutors with Clients</title>
                <link>https://jira.mongodb.org/browse/SERVER-48980</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&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;</description>
                <environment></environment>
        <key id="1384238">SERVER-48980</key>
            <summary>Associate ServiceExecutors with Clients</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="ben.caimano@mongodb.com">Benjamin Caimano</assignee>
                                    <reporter username="ben.caimano@mongodb.com">Benjamin Caimano</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 Jun 2020 21:08:21 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:43 +0000</updated>
                            <resolved>Mon, 31 Aug 2020 17:25:29 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3391487" author="xgen-internal-githook" created="Mon, 14 Sep 2020 04:57:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ben Caimano&apos;, &apos;email&apos;: &apos;ben.caimano@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50867&quot; title=&quot;Roll back ServiceStateMachine changes temporarily&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50867&quot;&gt;&lt;del&gt;SERVER-50867&lt;/del&gt;&lt;/a&gt; Roll back ServiceStateMachine changes temporarily&lt;/p&gt;

&lt;p&gt;This reverts these commits:&lt;br/&gt;
b039b24746e1d1fb10a32e1ca4831423c01d4cd7: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48980&quot; title=&quot;Associate ServiceExecutors with Clients&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48980&quot;&gt;&lt;del&gt;SERVER-48980&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
97e16187ff3065d242a61a52e7b6edd4d439fb30: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49072&quot; title=&quot;Make ServiceExecutors into Decorations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49072&quot;&gt;&lt;del&gt;SERVER-49072&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
0607a6c291bf4cf4580a4444d826ed3c3ac3df47: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49104&quot; title=&quot;Futurize ServiceStateMachine transitions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49104&quot;&gt;&lt;del&gt;SERVER-49104&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/827a25eb01bc5ddf766b3a543ef0ba5112953e1b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/827a25eb01bc5ddf766b3a543ef0ba5112953e1b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3391466" author="xgen-internal-githook" created="Mon, 14 Sep 2020 04:06:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ben Caimano&apos;, &apos;email&apos;: &apos;ben.caimano@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50867&quot; title=&quot;Roll back ServiceStateMachine changes temporarily&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50867&quot;&gt;&lt;del&gt;SERVER-50867&lt;/del&gt;&lt;/a&gt; Roll back ServiceStateMachine changes temporarily&lt;/p&gt;

&lt;p&gt;This reverts these commits:&lt;br/&gt;
b039b24746e1d1fb10a32e1ca4831423c01d4cd7: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48980&quot; title=&quot;Associate ServiceExecutors with Clients&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48980&quot;&gt;&lt;del&gt;SERVER-48980&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
97e16187ff3065d242a61a52e7b6edd4d439fb30: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49072&quot; title=&quot;Make ServiceExecutors into Decorations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49072&quot;&gt;&lt;del&gt;SERVER-49072&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
0607a6c291bf4cf4580a4444d826ed3c3ac3df47: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49104&quot; title=&quot;Futurize ServiceStateMachine transitions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49104&quot;&gt;&lt;del&gt;SERVER-49104&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: fixed_thread_pool_handshaking&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/575f370475bd31fc457a93a776061f1b80448028&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/575f370475bd31fc457a93a776061f1b80448028&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3368079" author="xgen-internal-githook" created="Mon, 31 Aug 2020 16:41:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ben Caimano&apos;, &apos;email&apos;: &apos;ben.caimano@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48980&quot; title=&quot;Associate ServiceExecutors with Clients&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48980&quot;&gt;&lt;del&gt;SERVER-48980&lt;/del&gt;&lt;/a&gt; Associate ServiceExecutors with Clients&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b039b24746e1d1fb10a32e1ca4831423c01d4cd7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b039b24746e1d1fb10a32e1ca4831423c01d4cd7&lt;/a&gt;&lt;/p&gt;</comment>
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                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="1389334">SERVER-49072</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="1392360">SERVER-49109</issuekey>
        </issuelink>
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                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="1589215">DOCS-14120</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="543625">SERVER-34986</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1469916">SERVER-50867</issuekey>
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