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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-77254] Make analyzeShardKey monotonicity tests more robust</title>
                <link>https://jira.mongodb.org/browse/SERVER-77254</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There have been multiple BFs for the monotonicity tests where the analyzeShardKey command incorrectly reports that a shard key is not monotonic although it is. Simply increasing the number of documents (i.e. data points for the correlation coefficient calculation) like in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71361&quot; title=&quot;Investigate why the monotonocity check in monotonicity_range_sharding_non_compound.js is incorrect sometimes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71361&quot;&gt;&lt;del&gt;SERVER-71361&lt;/del&gt;&lt;/a&gt; does not fully solve the issue since the OplogApplier is able to batch a lot of inserts together (replWriterThreadCount itself defaults to 16) so it is unclear what the minimum number of documents is in order to smooth out the noise from parallel oplog application. Further investigation suggests that the cause might just be that each monotonicity test inserts the documents all at once which is not realistic because in practice those documents are likely inserted across a larger timespan so there is unlikely to be this level of batching that we have been seeing in the test. So the fix should be to make the test instead insert the documents in multiple insert commands and wait for the secondaries to catch up after each command.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2344086">SERVER-77254</key>
            <summary>Make analyzeShardKey monotonicity tests more robust</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="13201">Fixed</resolution>
                                        <assignee username="cheahuychou.mao@mongodb.com">Cheahuychou Mao</assignee>
                                    <reporter username="cheahuychou.mao@mongodb.com">Cheahuychou Mao</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 May 2023 04:12:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:21:17 +0000</updated>
                            <resolved>Thu, 18 May 2023 17:21:18 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc2</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5435914" author="xgen-internal-githook" created="Thu, 18 May 2023 19:13:00 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Cheahuychou Mao&apos;, &apos;email&apos;: &apos;mao.cheahuychou@gmail.com&apos;, &apos;username&apos;: &apos;cheahuychou&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77254&quot; title=&quot;Make analyzeShardKey monotonicity tests more robust&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77254&quot;&gt;&lt;del&gt;SERVER-77254&lt;/del&gt;&lt;/a&gt; Make analyzeShardKey monotonicity tests more robust&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c38058e7f6da3d16004a39faacd8580a811d10d9)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/95a074ae89b63e1b3643f6d71d589c4879dff2b0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/95a074ae89b63e1b3643f6d71d589c4879dff2b0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5435584" author="xgen-internal-githook" created="Thu, 18 May 2023 17:14:04 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Cheahuychou Mao&apos;, &apos;email&apos;: &apos;mao.cheahuychou@gmail.com&apos;, &apos;username&apos;: &apos;cheahuychou&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77254&quot; title=&quot;Make analyzeShardKey monotonicity tests more robust&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77254&quot;&gt;&lt;del&gt;SERVER-77254&lt;/del&gt;&lt;/a&gt; Make analyzeShardKey monotonicity tests more robust&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c38058e7f6da3d16004a39faacd8580a811d10d9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c38058e7f6da3d16004a39faacd8580a811d10d9&lt;/a&gt;&lt;/p&gt;</comment>
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