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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-49072] Make ServiceExecutors into Decorations</title>
                <link>https://jira.mongodb.org/browse/SERVER-49072</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, it schedules 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;). We want to allow a &lt;tt&gt;Client&lt;/tt&gt; to chose its own &lt;tt&gt;ServiceExecutor&lt;/tt&gt;, so we need to provide stronger lifetime guarantees and better access patterns.&lt;/p&gt;

&lt;p&gt; Each &lt;tt&gt;ServiceExecutor&lt;/tt&gt; should be a &lt;tt&gt;Decoration&lt;/tt&gt; on the &lt;tt&gt;ServiceContext&lt;/tt&gt; (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/e8da98999ff4aa201b2805fbd4b379a9f0e807a7/src/mongo/db/auth/auth_decorations.cpp#L48-L49&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; is an example). This makes these executors close to immortal.&lt;br/&gt;
We&apos;ll also want to move the logic for when to chose if we use the &lt;tt&gt;ServiceExecutorReserved&lt;/tt&gt; into the &lt;tt&gt;ServiceStateMachine&lt;/tt&gt; after we make the client &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ba3e5964f9ac140723df5b8a012306b30a1cb5b9/src/mongo/transport/service_state_machine.cpp#L307&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1389334">SERVER-49072</key>
            <summary>Make ServiceExecutors into Decorations</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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>Wed, 24 Jun 2020 19:04:18 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:34 +0000</updated>
                            <resolved>Mon, 17 Aug 2020 18:08:17 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3493018" author="xgen-internal-githook" created="Tue, 17 Nov 2020 01:16:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Reo Kimura&apos;, &apos;email&apos;: &apos;reo.kimura@mongodb.com&apos;, &apos;username&apos;: &apos;rkimura21&apos;}
&lt;p&gt;Message: &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; Make ServiceExecutors into Decorations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ab0703b3c6ad1607fa224c5be2b893ddbdad365e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ab0703b3c6ad1607fa224c5be2b893ddbdad365e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3493016" author="xgen-internal-githook" created="Tue, 17 Nov 2020 01:16:27 +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-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; Make ServiceExecutors into Decorations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/de143029f1057bc6607d2b0e8e89c55bdfba14cf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/de143029f1057bc6607d2b0e8e89c55bdfba14cf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3391486" author="xgen-internal-githook" created="Mon, 14 Sep 2020 04:57:16 +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="3391468" author="xgen-internal-githook" created="Mon, 14 Sep 2020 04:06:56 +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="3340351" author="xgen-internal-githook" created="Fri, 14 Aug 2020 18:57:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Reo Kimura&apos;, &apos;email&apos;: &apos;reo.kimura@mongodb.com&apos;, &apos;username&apos;: &apos;rkimura21&apos;}
&lt;p&gt;Message: &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; Make ServiceExecutors into Decorations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/97e16187ff3065d242a61a52e7b6edd4d439fb30&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/97e16187ff3065d242a61a52e7b6edd4d439fb30&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3340350" author="xgen-internal-githook" created="Fri, 14 Aug 2020 18:57:12 +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-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; Make ServiceExecutors into Decorations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/96e5ab8c9e0b20e58b81e5e8bf60d2a582c58d62&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/96e5ab8c9e0b20e58b81e5e8bf60d2a582c58d62&lt;/a&gt;&lt;/p&gt;</comment>
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