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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-73485] Remove jstests/parallel/basic*</title>
                <link>https://jira.mongodb.org/browse/SERVER-73485</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The parallel tests have become rather noisy. A significant portion (up to 87%) of the BFs generated involving these tests end up requiring &lt;a href=&quot;https://jira.mongodb.org/issues/?jql=project%20%3D%20BF%20AND%20summary%20~%20%22parallel%22%20AND%20(summary%20~%20%22%5C%22basic.js%5C%22%22%20OR%20summary%20~%20%22%5C%22basicPlus.js%5C%22%22)%20AND%20%22Type%20of%20fix%22%20%3D%20%22Test%20change%22%20ORDER%20BY%20key%20DESC&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;test-only fixes&lt;/a&gt; rather than &lt;a href=&quot;https://jira.mongodb.org/issues/?jql=project%20%3D%20BF%20AND%20summary%20~%20%22parallel%22%20AND%20(summary%20~%20%22%5C%22basic.js%5C%22%22%20OR%20summary%20~%20%22%5C%22basicPlus.js%5C%22%22)%20AND%20%22Type%20of%20fix%22%20%3D%20%22Non-test%20code%20change%22%20ORDER%20BY%20key%20DESC&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;actual server issues&lt;/a&gt;. Most of our parallel testing has moved to the concurrency suites, so it&apos;s not clear that these tests are providing enough value relative to the cost to maintain them.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2248363">SERVER-73485</key>
            <summary>Remove jstests/parallel/basic*</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="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="13201">Fixed</resolution>
                                        <assignee username="dan.larkin-york@mongodb.com">Dan Larkin-York</assignee>
                                    <reporter username="dan.larkin-york@mongodb.com">Dan Larkin-York</reporter>
                        <labels>
                            <label>techdebt</label>
                    </labels>
                <created>Tue, 31 Jan 2023 15:59:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:27:07 +0000</updated>
                            <resolved>Fri, 25 Aug 2023 19:40:37 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>1</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="5660373" author="xgen-internal-githook" created="Fri, 25 Aug 2023 19:31:58 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Dan Larkin-York&apos;, &apos;email&apos;: &apos;dan.larkin-york@mongodb.com&apos;, &apos;username&apos;: &apos;dhly-etc&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73485&quot; title=&quot;Remove jstests/parallel/basic*&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73485&quot;&gt;&lt;del&gt;SERVER-73485&lt;/del&gt;&lt;/a&gt; Remove jstests/parallel/basic* and associated dead code&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/456f73fc1f444467f515838d963124617f63b241&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/456f73fc1f444467f515838d963124617f63b241&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5174767" author="anton.korshunov" created="Tue, 7 Feb 2023 16:45:20 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn@mongodb.com&quot;&gt;max.hirschhorn@mongodb.com&lt;/a&gt; Parallel testing was not required to reproduce the bug described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65814&quot; title=&quot;Avoid resetting system variables on plan recovery if they&amp;#39;re not registered in RuntimeEnvironment&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65814&quot;&gt;&lt;del&gt;SERVER-65814&lt;/del&gt;&lt;/a&gt;. It was a coincidence that while doing parallel testing we created a plan cache entry with certain properties which we were able to reuse in another test, but due to a programming error the second test would blow up. It&apos;s interesting that we didn&apos;t create a standalone test for this issue, perhaps the thinking was that we had several BFs in the parallel suite with the same symptom and existing test coverage would be enough. &lt;/p&gt;

&lt;p&gt;Similarly, parallel testing wasn&apos;t required to cause or reproduce the bug described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65897&quot; title=&quot;Encode the collection for index filters in encodeForIndexFilters()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65897&quot;&gt;&lt;del&gt;SERVER-65897&lt;/del&gt;&lt;/a&gt;, and an existing test was extended to cover this scenario. &lt;/p&gt;

&lt;p&gt;I can&apos;t say that we were heavily relying on the parallel suite to test the SBE plan cache, but it was definitely of some interest for us, and luckily we revealed a couple real issues which otherwise could be caught only by the fuzzer. However, I tend to agree that all parallel testing should be planned, designed and implemented using the concurrency suites and be based on well-thought scenarios rather than on randomness and sheer luck (for that we have the fuzzer).&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="682875">SERVER-39362</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
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                                        <issuelink>
            <issuekey id="2237188">SERVER-73035</issuekey>
        </issuelink>
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