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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-19092] ConnectionPool&apos;s per-host list ends up with deleted connections</title>
                <link>https://jira.mongodb.org/browse/SERVER-19092</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The ConnectionPool class is used by both replication and sharding. The sharding FSM tests when run sufficiently long encounter a bug where a deleted entry appears in the per-client pool.&lt;/p&gt;</description>
                <environment></environment>
        <key id="212568">SERVER-19092</key>
            <summary>ConnectionPool&apos;s per-host list ends up with deleted connections</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="schwerin@mongodb.com">Andy Schwerin</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>todo_in_code</label>
                    </labels>
                <created>Tue, 23 Jun 2015 20:13:57 +0000</created>
                <updated>Sun, 10 Apr 2022 07:35:03 +0000</updated>
                            <resolved>Tue, 29 Sep 2015 17:54:03 +0000</resolved>
                                                                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="1046429" author="schwerin" created="Tue, 29 Sep 2015 17:54:03 +0000"  >&lt;p&gt;The connection pool in question is scheduled for removal before the release of 3.2. Its only user is NetworkInterfaceImpl, which is superseded by NetworkInterfaceASIO.&lt;/p&gt;</comment>
                            <comment id="1043576" author="schwerin" created="Fri, 25 Sep 2015 16:14:27 +0000"  >&lt;p&gt;As soon as we delete the code.&lt;/p&gt;

</comment>
                            <comment id="1043008" author="adam.midvidy" created="Fri, 25 Sep 2015 03:45:15 +0000"  >&lt;p&gt;Now that ASIO is the default in master and has been relatively stable in evergreen, can we close this as &apos;Gone Away&apos; ?&lt;/p&gt;</comment>
                            <comment id="949856" author="xgen-internal-githook" created="Wed, 24 Jun 2015 21:34:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19092&quot; title=&quot;ConnectionPool&amp;#39;s per-host list ends up with deleted connections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19092&quot;&gt;&lt;del&gt;SERVER-19092&lt;/del&gt;&lt;/a&gt; Increase the connection pool cleanup interval&lt;/p&gt;

&lt;p&gt;This change is just a workaround until we discover the underlying cause.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/92750368e7a65031f4545d7c52ba268033b94a74&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/92750368e7a65031f4545d7c52ba268033b94a74&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="949282" author="xgen-internal-githook" created="Wed, 24 Jun 2015 15:00:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19092&quot; title=&quot;ConnectionPool&amp;#39;s per-host list ends up with deleted connections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19092&quot;&gt;&lt;del&gt;SERVER-19092&lt;/del&gt;&lt;/a&gt; Cleanup connection pool&lt;/p&gt;

&lt;p&gt;Remove some unused code and make fields constant. No functional change.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/34549ae64ad1cd40c3c9652dbc384768633b18f9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/34549ae64ad1cd40c3c9652dbc384768633b18f9&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="231396">SERVER-20618</issuekey>
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            <issuekey id="935535">SERVER-43430</issuekey>
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            <issuelink>
            <issuekey id="2021539">SERVER-65414</issuekey>
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                            <customfieldvalue>&lt;p&gt;It is non-deterministic, but seems to happen more frequently if the cleanup interval is lowered:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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&lt;p/&gt;

&lt;p&gt;Only happens in the optimized build. Command line to run the test:&lt;/p&gt;

&lt;p/&gt;
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