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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DRIVERS-1926] Server selection load balancing algorithm prose test is flaky</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-1926</link>
                <project id="10980" key="DRIVERS">Drivers</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #fafbfc;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;The &lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/server-selection/server-selection-tests.rst#operationcount-based-selection-within-latency-window-multi-threaded-or-async-drivers&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;operationCount based selection prose test&lt;/a&gt; in the server selection spec has proven to fail occasionally due to random slowness in in one of the mongoses. This is likely due to the mongoses competing for resources on the same virtual host (which is itself competing for resources). The C# and Rust driver teams have experimented with modifying this test to reduce the failures to some success. We should include these modifications in the actual spec so that future teams will not experience the same failures.&lt;br/&gt;
&#160;&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;Drivers teams&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;Their tests occasionally fail&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;The test fails 1-2% of the time&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;Yes&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;</description>
                <environment></environment>
        <key id="1879097">DRIVERS-1926</key>
            <summary>Server selection load balancing algorithm prose test is flaky</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</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="-1">Unassigned</assignee>
                                    <reporter username="patrick.freed@mongodb.com">Patrick Freed</reporter>
                        <labels>
                            <label>prose-test</label>
                    </labels>
                <created>Mon, 20 Sep 2021 22:44:07 +0000</created>
                <updated>Wed, 18 Oct 2023 02:06:43 +0000</updated>
                                                                <component>Server Selection</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4492668" author="xgen-internal-githook" created="Tue, 19 Apr 2022 21:46:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Patrick Freed&apos;, &apos;email&apos;: &apos;patrick.freed@mongodb.com&apos;, &apos;username&apos;: &apos;patrickfreed&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DRIVERS-1926&quot; title=&quot;Server selection load balancing algorithm prose test is flaky&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DRIVERS-1926&quot;&gt;DRIVERS-1926&lt;/a&gt; Improve stability of server selection load balancing algorithm test (#1166)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/specifications/commit/96203ae6219c7b9a53cfe91294cc713821cdf732&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/commit/96203ae6219c7b9a53cfe91294cc713821cdf732&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1885513">CSHARP-3882</issuekey>
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            <issuekey id="1885512">CXX-2379</issuekey>
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            <issuekey id="1885521">RUBY-2799</issuekey>
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            <issuekey id="1885514">GODRIVER-2166</issuekey>
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            <issuekey id="1885520">MOTOR-823</issuekey>
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            <issuekey id="1885517">PHPLIB-727</issuekey>
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            <issuekey id="1885518">PYTHON-2924</issuekey>
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            <issuekey id="1885515">JAVA-4320</issuekey>
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            <issuekey id="1885516">NODE-3638</issuekey>
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                            <customfieldvalue>&lt;p&gt;Drivers need to update the operationCount based selection prose test implementation from server-selection-tests.rst&lt;/p&gt;</customfieldvalue>

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      <a href='https://jira.mongodb.org/browse/CDRIVER-4170'>CDRIVER-4170</a>
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