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    <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-73866] Re-enable agg_merge_when_not_matched_insert.js in config_fuzzer passthrough suites</title>
                <link>https://jira.mongodb.org/browse/SERVER-73866</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The test (which performs concurrent user writes an chunk migrations)is currently &lt;a href=&quot;https://github.com/mongodb/mongo/blob/188549516c293b65c2c3cba5ae05a573b2eab460/jstests/concurrency/fsm_workloads/agg_merge_when_not_matched_insert.js#L14-L15&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;blacklisted&lt;/a&gt; from config fuzzer passthrough suites because it is sensitive to specific values of a threshold parameter (details described &lt;a href=&quot;https://jira.mongodb.org/browse/BF-27441?focusedCommentId=5126647&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-5126647&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;here&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;In order to re-enable it, we can either tolerate timeout errors or exclude the execution of migration when the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/188549516c293b65c2c3cba5ae05a573b2eab460/src/mongo/db/s/sharding_runtime_d_params.idl#L114-L125&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;server parameter&lt;/a&gt; regulating the migration goes below a threshold value (to be qualified).&lt;/p&gt;</description>
                <environment></environment>
        <key id="2260164">SERVER-73866</key>
            <summary>Re-enable agg_merge_when_not_matched_insert.js in config_fuzzer passthrough suites</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="allison.easton@mongodb.com">Allison Easton</assignee>
                                    <reporter username="paolo.polato@mongodb.com">Paolo Polato</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 10 Feb 2023 09:10:45 +0000</created>
                <updated>Sun, 29 Oct 2023 21:26:33 +0000</updated>
                            <resolved>Wed, 10 May 2023 15:05:23 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5642406" author="xgen-internal-githook" created="Fri, 18 Aug 2023 09:10:49 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Allison Easton&apos;, &apos;email&apos;: &apos;allison.easton@mongodb.com&apos;, &apos;username&apos;: &apos;allisoneaston&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73866&quot; title=&quot;Re-enable agg_merge_when_not_matched_insert.js in config_fuzzer passthrough suites&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73866&quot;&gt;&lt;del&gt;SERVER-73866&lt;/del&gt;&lt;/a&gt; Re-enable agg_merge_when_not_matched_insert.js in config_fuzzer passthrough suites&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 48be174f68488b8e0c5695081afe1d41260a259f)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3da083c192de5eccd0285784882b998c33a47adc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3da083c192de5eccd0285784882b998c33a47adc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5414477" author="xgen-internal-githook" created="Wed, 10 May 2023 14:31:53 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Allison Easton&apos;, &apos;email&apos;: &apos;allison.easton@mongodb.com&apos;, &apos;username&apos;: &apos;allisoneaston&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73866&quot; title=&quot;Re-enable agg_merge_when_not_matched_insert.js in config_fuzzer passthrough suites&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73866&quot;&gt;&lt;del&gt;SERVER-73866&lt;/del&gt;&lt;/a&gt; Re-enable agg_merge_when_not_matched_insert.js in config_fuzzer passthrough suites&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/48be174f68488b8e0c5695081afe1d41260a259f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/48be174f68488b8e0c5695081afe1d41260a259f&lt;/a&gt;&lt;/p&gt;</comment>
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                            <customfieldvalue>This has changed the `maxCatchUpPercentageBeforeBlockingWrites` parameter to be settable both at startup (as before) and at runtime (new). We should update the server parameters doc section about this parameter. Here is the link to the doc in question: &lt;a href=&quot;https://www.mongodb.com/docs/manual/reference/parameters/#mongodb-parameter-param.maxCatchUpPercentageBeforeBlockingWrites&quot;&gt;https://www.mongodb.com/docs/manual/reference/parameters/#mongodb-parameter-param.maxCatchUpPercentageBeforeBlockingWrites&lt;/a&gt;&lt;br/&gt;
&lt;br/&gt;
We should replace the line:&lt;br/&gt;
&amp;quot;You cannot change &lt;br/&gt;
maxCatchUpPercentageBeforeBlockingWrites&lt;br/&gt;
&amp;nbsp;during runtime.&amp;quot;&lt;br/&gt;
With:&lt;br/&gt;
&amp;quot;During runtime, you can also set the parameter with the setParameter command:&lt;br/&gt;
&lt;br/&gt;
db.adminCommand( { setParameter: 1, maxCatchUpPercentageBeforeBlockingWrites: 20} )&amp;quot;&lt;br/&gt;
&lt;br/&gt;
Similar to the last two sentences in this section: &lt;a href=&quot;https://www.mongodb.com/docs/manual/reference/parameters/#mongodb-parameter-param.enableShardedIndexConsistencyCheck&quot;&gt;https://www.mongodb.com/docs/manual/reference/parameters/#mongodb-parameter-param.enableShardedIndexConsistencyCheck&lt;/a&gt;.&lt;br/&gt;
Though we should specify that this is only settable at runtime from 7.1.&lt;br/&gt;
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