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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>
    </build-info>


<item>
            <title>[SERVER-77326] Change usage of .count() to .itCount() in transaction_reaper.js</title>
                <link>https://jira.mongodb.org/browse/SERVER-77326</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;From the docs: When you call count() without a query predicate, you may receive inaccurate document counts. Without a query predicate, count() methods return results based on the collection&apos;s metadata, which may result in an approximate count.&lt;/p&gt;

&lt;p&gt;Change usage of .count() to .itCount() for all usages in transaction_reaper.js.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2345850">SERVER-77326</key>
            <summary>Change usage of .count() to .itCount() in transaction_reaper.js</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="sanika.phanse@mongodb.com">Sanika Phanse</reporter>
                        <labels>
                            <label>intern</label>
                            <label>new-eng</label>
                    </labels>
                <created>Fri, 19 May 2023 16:36:52 +0000</created>
                <updated>Fri, 16 Jun 2023 18:36:42 +0000</updated>
                            <resolved>Fri, 16 Jun 2023 18:36:42 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5505951" author="JIRAUSER1253438" created="Fri, 16 Jun 2023 17:29:20 +0000"  >&lt;p&gt;Hey &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;, thanks for detailing the cases in which fast count is inaccurate. I was not aware of the cases that cause it to be inaccurate, just that it can. For the related BF, I had seen in the datafiles that the 1500 documents were written to `test.test`, but given this two hour delay, it makes sense that the session records would&apos;ve been reaped. I agree with your analysis.&lt;/p&gt;</comment>
                            <comment id="5494998" author="max.hirschhorn@10gen.com" created="Tue, 13 Jun 2023 13:22:46 +0000"  >&lt;p&gt;Hey &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=sanika.phanse%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;sanika.phanse@mongodb.com&quot;&gt;sanika.phanse@mongodb.com&lt;/a&gt;, I wanted to check in about the ways fast&amp;#45;count can be inaccurate because I wonder if there is a different issue happening in the Evergreen failure.&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;If the fast&amp;#45;count is queried in the midst of concurrent writes then the returned count is approximate.&lt;/li&gt;
	&lt;li&gt;The fast&amp;#45;count value is accurate after all writes to the collection has quiesced.&lt;/li&gt;
	&lt;li&gt;The fast&amp;#45;count value is accurate across replication rollback and clean shutdown.&lt;/li&gt;
	&lt;li&gt;If there is an unclean shutdown then the fast&amp;#45;count value will be permanently diverge from the true value until the &lt;tt&gt;validate&lt;/tt&gt; command is run for the collection.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/58e64eeac698a4cbc5e7210ffa7aacd2e9a2b931/jstests/noPassthrough/transaction_reaper.js#L104&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;The transaction&amp;#95;reaper.js test would have previously asserted the fast&amp;#45;count for the config.system.sessions collection is equal to &lt;tt&gt;nSessions&lt;/tt&gt;&lt;/a&gt; on line 94 (the failing assertion was line 104). This suggests the documents being absent from the config.system.sessions collection is because they were deleted.&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;92&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;this&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.refresh();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;93&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;this&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.assertOutstandingTransactions(0);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#6ce26c&quot;  style=&quot; background-color: #6ce26c !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: white;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;94&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  bgcolor=&quot;#e0e0e0&quot;  style=&quot; background-color: #e0e0e0 !important; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;this&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.assertOutstandingSessions(nSessions);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;95&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;96&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;for&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; (&lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; i = 0; i &amp;lt; nSessions; i++) {&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;97&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    &lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// make a session and get it to the collection&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;98&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; session = &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;this&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.sessions[i];&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;99&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.commandWorked(session.getDatabase(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;test&quot;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;).test.save({a: 1}));&lt;/span&gt;&lt;/pre&gt;
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							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;100&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;101&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;102&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// Ensure a write flushes a transaction&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;103&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;this&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.assertOutstandingTransactions(nSessions);&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  bgcolor=&quot;#6ce26c&quot;  style=&quot; background-color: #6ce26c !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: white;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;104&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
						&lt;td  bgcolor=&quot;#e0e0e0&quot;  style=&quot; background-color: #e0e0e0 !important; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;this&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.assertOutstandingSessions(nSessions);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;I think the underlying issue may be hardware related (it is known to happen with the MacStadium machines). I see a total of &lt;a href=&quot;https://github.com/mongodb/mongo/blob/58e64eeac698a4cbc5e7210ffa7aacd2e9a2b931/jstests/noPassthrough/transaction_reaper.js#L76&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;1500 (== nSessions)&lt;/a&gt; &quot;New transaction started&quot; log messages. One notable detail is there is a 2&amp;#45;hour gap from 14:25:15 to 16:26:21. The mongod process was still active as seen from it taking new checkpoints each minute for the 2 hours. I don&apos;t know why the &lt;tt&gt;mongo&lt;/tt&gt; shell process seemingly paused in running the contents of the test. Since the config.system.sessions documents expire after 30 minutes by default (== logicalSessionTimeoutMinutes) the previously started logical sessions would have long had their documents deleted from config.system.sessions collection. Additionally, the later executed retryable writes wouldn&apos;t have had a document written to the config.system.sessions collection yet because the refreshLogicalSessionCacheNow command to flush the in&amp;#45;memory LogicalSessionCache the config.system.sessions collection isn&apos;t called again (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/58e64eeac698a4cbc5e7210ffa7aacd2e9a2b931/jstests/noPassthrough/transaction_reaper.js#L121-L123&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;via Fixture.prototype.refresh()&lt;/a&gt;) between lines 94 and 104.&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:transaction_reaper] d21270| 2023-05-04T14:25:15.830-04:00 D4 TXN      23984   [conn1] &quot;New transaction started&quot;,&quot;attr&quot;:{&quot;txnNumber&quot;:0,&quot;lsid&quot;:{&quot;uuid&quot;:{&quot;$uuid&quot;:&quot;fc94114b-3407-4f1a-9dd0-eaf57c8da265&quot;}},&quot;apiParameters&quot;:{}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:transaction_reaper] d21270| 2023-05-04T14:25:15.840-04:00 D4 TXN      23984   [conn1] &quot;New transaction started&quot;,&quot;attr&quot;:{&quot;txnNumber&quot;:0,&quot;lsid&quot;:{&quot;uuid&quot;:{&quot;$uuid&quot;:&quot;a762a664-3b3b-4385-8da8-767b378632a0&quot;}},&quot;apiParameters&quot;:{}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:transaction_reaper] d21270| 2023-05-04T14:25:15.847-04:00 D4 TXN      23984   [conn1] &quot;New transaction started&quot;,&quot;attr&quot;:{&quot;txnNumber&quot;:0,&quot;lsid&quot;:{&quot;uuid&quot;:{&quot;$uuid&quot;:&quot;c1a4977e-b4ff-4604-95c5-c9fc8797194b&quot;}},&quot;apiParameters&quot;:{}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;...&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:transaction_reaper] d21270| 2023-05-04T16:26:21.077-04:00 D4 TXN      23984   [conn2] &quot;New transaction started&quot;,&quot;attr&quot;:{&quot;txnNumber&quot;:0,&quot;lsid&quot;:{&quot;uuid&quot;:{&quot;$uuid&quot;:&quot;3d08ad51-da56-4dda-b797-f993f2daa570&quot;}},&quot;apiParameters&quot;:{}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:transaction_reaper] d21270| 2023-05-04T16:26:21.086-04:00 D4 TXN      23984   [conn2] &quot;New transaction started&quot;,&quot;attr&quot;:{&quot;txnNumber&quot;:0,&quot;lsid&quot;:{&quot;uuid&quot;:{&quot;$uuid&quot;:&quot;64692630-df28-4e80-8d1c-de4a2e9e4311&quot;}},&quot;apiParameters&quot;:{}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:transaction_reaper] d21270| 2023-05-04T16:26:21.095-04:00 D4 TXN      23984   [conn2] &quot;New transaction started&quot;,&quot;attr&quot;:{&quot;txnNumber&quot;:0,&quot;lsid&quot;:{&quot;uuid&quot;:{&quot;$uuid&quot;:&quot;4dafdb1f-a93c-4756-b431-4c446acefc73&quot;}},&quot;apiParameters&quot;:{}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;&lt;a href=&quot;https://parsley.mongodb.com/resmoke/7144f76be8a1d36fa21ead32f9ed72cb/test/175c03f1298a4f2f4d5f3090f2b2e4de?bookmarks=0,31,1774,3159,3405,3522,4161&amp;amp;shareLine=0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://parsley.mongodb.com/resmoke/7144f76be8a1d36fa21ead32f9ed72cb/test/175c03f1298a4f2f4d5f3090f2b2e4de?bookmarks=0,31,1774,3159,3405,3522,4161&amp;amp;shareLine=0&lt;/a&gt;&lt;/p&gt;</comment>
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