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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>[DRIVERS-2323] Run all possible change streams spec tests against sharded topologies</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-2323</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;&lt;em&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DRIVERS-2322&quot; title=&quot;Restrict change streams unified tests to replicasets&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DRIVERS-2322&quot;&gt;DRIVERS-2322&lt;/a&gt; will likely restrict the tests in change-streams.yml to only run against replicasets. Running those tests against sharded clusters results in a number of failures for tests that expect a particular order of events (extra drop and write events are observed in at least a couple drivers). We should add sharded topologies back into the test-file-level runOnRequirements and investigate the cause of the failures.&lt;/em&gt;&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;&lt;em&gt;Users of change streams against sharded topologies.&lt;/em&gt;&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;&lt;em&gt;In not testing change streams against sharded topologies, driver devs are missing test coverage for the behavior of change streams with sharded topologies, which should be supported behavior.&lt;/em&gt;&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;&lt;em&gt;There are many users of change streams that are interacting with sharded clusters.&lt;/em&gt;&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;&lt;em&gt;If we do not test against sharded topologies, we may miss bugs introduced in change streams changes.&lt;/em&gt;&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;&lt;em&gt;Somewhat.&lt;/em&gt;&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;&lt;em&gt;No.&lt;/em&gt;&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;&lt;em&gt;Yes.&lt;/em&gt;&lt;/p&gt;
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                <environment></environment>
        <key id="2043558">DRIVERS-2323</key>
            <summary>Run all possible change streams spec tests against sharded topologies</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="benji.rewis@mongodb.com">Benji Rewis</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 May 2022 16:25:18 +0000</created>
                <updated>Tue, 17 May 2022 18:28:22 +0000</updated>
                                                                <component>Change Streams</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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            <issuekey id="2043549">DRIVERS-2322</issuekey>
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            <issuekey id="2009702">DRIVERS-2248</issuekey>
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            <issuekey id="2026081">PHPLIB-842</issuekey>
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