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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-49106] Add poll function to the ServiceExecutor API</title>
                <link>https://jira.mongodb.org/browse/SERVER-49106</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If we are on a thread pool, we want to avoid blocking threads while waiting for new data to read. This would imply that a thread somewhere is &lt;span class=&quot;error&quot;&gt;&amp;#91;e&amp;#93;&lt;/span&gt;polling for us, most likely an &lt;tt&gt;ASIOReactor&lt;/tt&gt;. However, if we&#8217;re already on a dedicated thread, we want to block our own thread. To solve this contradiction, we want to provide a function &lt;tt&gt;Future&amp;lt;void&amp;gt; ServiceExecutor::waitForData(Session*)&lt;/tt&gt; that polls and then reschedules execution for its future. We should be able to invoke &lt;tt&gt;asio::async_read&lt;/tt&gt; with an &lt;tt&gt;asio::null_buffers&lt;/tt&gt;, thus copying no data until we are safely on the correct thread.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1392357">SERVER-49106</key>
            <summary>Add poll function to the ServiceExecutor API</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="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</assignee>
                                    <reporter username="ben.caimano@mongodb.com">Benjamin Caimano</reporter>
                        <labels>
                    </labels>
                <created>Thu, 25 Jun 2020 17:44:09 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:29 +0000</updated>
                            <resolved>Tue, 28 Jul 2020 23:33:10 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3311068" author="xgen-internal-githook" created="Tue, 28 Jul 2020 23:32:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49106&quot; title=&quot;Add poll function to the ServiceExecutor API&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49106&quot;&gt;&lt;del&gt;SERVER-49106&lt;/del&gt;&lt;/a&gt; Add poll function to the ServiceExecutor API&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/165dfb50f7693cadb80e988d08222700b1cc6b5c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/165dfb50f7693cadb80e988d08222700b1cc6b5c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3298476" author="xgen-internal-githook" created="Thu, 23 Jul 2020 13:28:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;, &apos;username&apos;: &apos;henrikedin&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49106&quot; title=&quot;Add poll function to the ServiceExecutor API&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49106&quot;&gt;&lt;del&gt;SERVER-49106&lt;/del&gt;&lt;/a&gt; Add poll function to the ServiceExecutor API&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit a3ed860ba4fbb9a662440c8e9608fef5fa6c8712.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/15d23a48c8a8767ce3c5fc5165d5888608a454b4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/15d23a48c8a8767ce3c5fc5165d5888608a454b4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3297804" author="xgen-internal-githook" created="Wed, 22 Jul 2020 22:53:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49106&quot; title=&quot;Add poll function to the ServiceExecutor API&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49106&quot;&gt;&lt;del&gt;SERVER-49106&lt;/del&gt;&lt;/a&gt; Add poll function to the ServiceExecutor API&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a3ed860ba4fbb9a662440c8e9608fef5fa6c8712&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a3ed860ba4fbb9a662440c8e9608fef5fa6c8712&lt;/a&gt;&lt;/p&gt;</comment>
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                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="1418599">SERVER-49848</issuekey>
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                            <issuelinktype id="10020">
                    <name>Gantt Dependency</name>
                                                                <inwardlinks description="has to be done after">
                                        <issuelink>
            <issuekey id="1392356">SERVER-49105</issuekey>
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