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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-20471] The connection pool&apos;s ASIOTimer needs more synchronization and shared state to work with asio&apos;s timer</title>
                <link>https://jira.mongodb.org/browse/SERVER-20471</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;asio&apos;s underlying timers have fairly loose behavior on cancel.  Specifically, a cancelled callback can be invoked with or without the cancelled error code.&lt;/p&gt;

&lt;p&gt;In the case of dtors that invoke callbacks, this means that we must have a shared pointer around with a lifetime longer than the actual ASIOTimer so that we can check if we&apos;ve been cancelled (because we can&apos;t look at the original object).&lt;/p&gt;

&lt;p&gt;In addition, we can call cancel/set multiple times, so we should keep a counter around so we know if the callback we&apos;re in should be invoked, even if the timer itself is currently active&lt;/p&gt;</description>
                <environment></environment>
        <key id="230330">SERVER-20471</key>
            <summary>The connection pool&apos;s ASIOTimer needs more synchronization and shared state to work with asio&apos;s timer</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="mira.carey@mongodb.com">Mira Carey</assignee>
                                    <reporter username="mira.carey@mongodb.com">Mira Carey</reporter>
                        <labels>
                    </labels>
                <created>Thu, 17 Sep 2015 19:32:41 +0000</created>
                <updated>Wed, 7 Oct 2015 21:35:22 +0000</updated>
                            <resolved>Fri, 18 Sep 2015 14:56:17 +0000</resolved>
                                    <version>3.1.8</version>
                                    <fixVersion>3.1.9</fixVersion>
                                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1033729" author="xgen-internal-githook" created="Thu, 17 Sep 2015 22:11:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hanumantmk&apos;, u&apos;name&apos;: u&apos;Jason Carey&apos;, u&apos;email&apos;: u&apos;jcarey@argv.me&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20471&quot; title=&quot;The connection pool&amp;#39;s ASIOTimer needs more synchronization and shared state to work with asio&amp;#39;s timer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20471&quot;&gt;&lt;del&gt;SERVER-20471&lt;/del&gt;&lt;/a&gt; Fix ASIO &amp;lt;-&amp;gt; ConnPool Timer callbacks&lt;/p&gt;

&lt;p&gt;asio&apos;s underlying timers have fairly loose behavior on cancel.&lt;br/&gt;
Specifically, a cancelled callback can be invoked with or without the&lt;br/&gt;
cancelled error code.&lt;/p&gt;

&lt;p&gt;In the case of dtors that invoke callbacks, this means that we must have&lt;br/&gt;
a shared pointer around with a lifetime longer than the actual ASIOTimer&lt;br/&gt;
so that we can check if we&apos;ve been cancelled (because we can&apos;t look at&lt;br/&gt;
the original object).&lt;/p&gt;

&lt;p&gt;In addition, we can call cancel/set multiple times, so we should keep a&lt;br/&gt;
counter around so we know if the callback we&apos;re in should be invoked,&lt;br/&gt;
even if the timer itself is currently active&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/06d14e5e510d69a902489c66524e186d39608ff3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/06d14e5e510d69a902489c66524e186d39608ff3&lt;/a&gt;&lt;/p&gt;</comment>
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