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    <title>MongoDB Jira</title>
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    <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>[CSHARP-2029] High CPU utilization when specifying an unknown server in the connection string.</title>
                <link>https://jira.mongodb.org/browse/CSHARP-2029</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;... and specifying a non-zero MinConnectionPoolSize.&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;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; connString = &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;mongodb://knownRemoteServer,unknownServer&quot;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; settings = MongoClientSettings.FromUrl(MongoUrl.Create(connString));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;settings.MinConnectionPoolSize = 1;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; client = &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;new&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; MongoClient(settings);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/tbody&gt;
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&lt;p/&gt;

&lt;p&gt;&lt;b&gt;knownRemoteServer&lt;/b&gt; - any MongoDB server&lt;br/&gt;
&lt;b&gt;unknownServer&lt;/b&gt; - unresolved hostname from DNS &lt;/p&gt;

&lt;p&gt;Reason: maintenance interval not used while connection error.&lt;/p&gt;</description>
                <environment></environment>
        <key id="414928">CSHARP-2029</key>
            <summary>High CPU utilization when specifying an unknown server in the connection string.</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="ExM">Anatoliy Koperin</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Aug 2017 14:22:32 +0000</created>
                <updated>Mon, 13 Jul 2020 20:40:20 +0000</updated>
                            <resolved>Mon, 13 Jul 2020 20:40:20 +0000</resolved>
                                    <version>2.4.4</version>
                                                    <component>Error Handling</component>
                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3283392" author="jeff.yemin" created="Mon, 13 Jul 2020 20:40:20 +0000"  >&lt;p&gt;Looks like this duplicates &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-2861&quot; title=&quot;Having incorrect credentials along with minPoolSize &amp;gt; 0 makes the driver to endlessly create new connections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-2861&quot;&gt;&lt;del&gt;CSHARP-2861&lt;/del&gt;&lt;/a&gt;, which was fixed in the 2.10.1 release&lt;/p&gt;</comment>
                            <comment id="1711022" author="exm" created="Fri, 27 Oct 2017 13:53:08 +0000"  >&lt;p&gt;Please consider this simple pull request.&lt;/p&gt;

&lt;p&gt;I make requests from many virtual servers with 1 CPU core.&lt;br/&gt;
When at least one mongo-router stops resolving in the DNS, then all servers hang in a cycle in the driver code.&lt;/p&gt;</comment>
                            <comment id="1645147" author="exm" created="Thu, 10 Aug 2017 14:26:55 +0000"  >&lt;p&gt;Pull request: &lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/pull/287&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/pull/287&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <issuelinktype id="10010">
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