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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>[DRIVERS-1948] Add a CMAP test that verifies the background thread hands over connections to threads doing checkout</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-1948</link>
                <project id="10980" key="DRIVERS">Drivers</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #fafbfc;border-color: #21313c;border-style: solid;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #fafbfc;&quot;&gt;
&lt;h3&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;&lt;b&gt;Summary&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;em&gt;What is the problem or use case, what are we trying to achieve?&lt;/em&gt;&lt;br/&gt;
Make sure the driver does not have increased connection checkout latencies during temporary states when a pool is not populated to its min size.&lt;/p&gt;
&lt;h3&gt;&lt;a name=&quot;Motivation&quot;&gt;&lt;/a&gt;&lt;b&gt;Motivation&lt;/b&gt;&lt;/h3&gt;
&lt;h4&gt;&lt;a name=&quot;Whoistheaffectedenduser%3F&quot;&gt;&lt;/a&gt;Who is the affected end user?&lt;/h4&gt;
&lt;p&gt;A user of a driver.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Howdoesthisaffecttheenduser%3F&quot;&gt;&lt;/a&gt;How does this affect the end user?&lt;/h4&gt;
&lt;p&gt;If a driver does not behave the way the test expects, it&apos;s a performance bug that may affect driver users. &lt;a href=&quot;https://jira.mongodb.org/browse/JAVA-4316&quot; title=&quot;The background thread should be able to hand over a new connection to a thread that is blocked by the max connecting limit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;JAVA-4316&quot;&gt;&lt;del&gt;JAVA-4316&lt;/del&gt;&lt;/a&gt; is an example of a situation when the user is affected by this bug in the Java driver.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Howlikelyisitthatthisproblemorusecasewilloccur%3F&quot;&gt;&lt;/a&gt;How likely is it that this problem or use case will occur?&lt;/h4&gt;
&lt;p&gt;Not very likely, and if there is a problem with connection checkout latencies, the behavior expected by the test is unlikely to solve the problem in full.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Iftheproblemdoesoccur%2Cwhataretheconsequencesandhowseverearethey%3F&quot;&gt;&lt;/a&gt;If the problem does occur, what are the consequences and how severe are they?&lt;/h4&gt;
&lt;p&gt;May cause higher checkout latencies during temporary states when a pool is not populated to its min size.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisissueurgent%3F&quot;&gt;&lt;/a&gt;Is this issue urgent?&lt;/h4&gt;
&lt;p&gt;No.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisticketrequiredbyadownstreamteam%3F&quot;&gt;&lt;/a&gt;Is this ticket required by a downstream team?&lt;/h4&gt;
&lt;p&gt;No.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Isthisticketonlyfortests%3F&quot;&gt;&lt;/a&gt;Is this ticket only for tests?&lt;/h4&gt;
&lt;p&gt;Depends on whether a driver has the specific performance bug or not. If not, then the driver will only need to grab the new test scenario.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;</description>
                <environment></environment>
        <key id="1896923">DRIVERS-1948</key>
            <summary>Add a CMAP test that verifies the background thread hands over connections to threads doing checkout</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="13453" iconUrl="https://jira.mongodb.org/images/icons/status_generic.gif" description="">Implementing</status>
                    <statusCategory id="4" key="indeterminate" colorName="inprogress"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="valentin.kovalenko@mongodb.com">Valentin Kavalenka</assignee>
                                    <reporter username="valentin.kovalenko@mongodb.com">Valentin Kavalenka</reporter>
                        <labels>
                            <label>size-small</label>
                            <label>spec-change</label>
                            <label>yaml-test</label>
                    </labels>
                <created>Wed, 13 Oct 2021 01:50:19 +0000</created>
                <updated>Fri, 29 Apr 2022 15:33:20 +0000</updated>
                                                                <component>CMAP</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="4171973" author="xgen-internal-githook" created="Fri, 5 Nov 2021 16:34:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Valentin Kovalenko&apos;, &apos;email&apos;: &apos;valentin.kovalenko@mongodb.com&apos;, &apos;username&apos;: &apos;stIncMale&apos;}
&lt;p&gt;Message: Add a CMAP test that verifies the background thread hands over connections to threads doing checkout (#1078)&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DRIVERS-1948&quot; title=&quot;Add a CMAP test that verifies the background thread hands over connections to threads doing checkout&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DRIVERS-1948&quot;&gt;DRIVERS-1948&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/specifications/commit/ec4fae839563617dc27ff8e793f9494f64d2a5a3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/commit/ec4fae839563617dc27ff8e793f9494f64d2a5a3&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1896929">CSHARP-3901</issuekey>
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            <issuelink>
            <issuekey id="1896930">GODRIVER-2182</issuekey>
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            <issuelink>
            <issuekey id="1896942">RUST-1052</issuekey>
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            <issuelink>
            <issuekey id="1896927">CDRIVER-4186</issuekey>
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            <issuekey id="1896928">CXX-2386</issuekey>
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            <issuelink>
            <issuekey id="1896931">JAVA-4346</issuekey>
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            <issuekey id="1896932">NODE-3666</issuekey>
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            <issuekey id="1896933">PHPLIB-732</issuekey>
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            <issuekey id="1896935">PYTHON-2941</issuekey>
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            <issuelink>
            <issuekey id="1896940">RUBY-2808</issuekey>
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            <issuekey id="1896937">MOTOR-829</issuekey>
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                    <name>Problem/Incident</name>
                                                                <inwardlinks description="is caused by">
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                            <customfieldvalue>&lt;p&gt;Implement the CMAP specification change done in &lt;a href=&quot;https://github.com/mongodb/specifications/pull/1078&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/pull/1078&lt;/a&gt;. The PR also introduced a test that verifies the implementation.&lt;/p&gt;</customfieldvalue>

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