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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-72421] Make `ftdc_mirrored_reads.js` wait for FTDC to converge </title>
                <link>https://jira.mongodb.org/browse/SERVER-72421</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is a test only issue, currently only concerning Windows variants. The following assertion is sensitive to the number of reads successfully mirrored by the primary, and observed on secondaries:&lt;/p&gt;
&lt;p/&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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					&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;    ...&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  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;    jsTestLog(&quot;Verifying diagnostic collection for mirrored reads on secondaries&quot;);&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  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;    let mirroredReadsSucceeded = getDiagnosticData(primary).succeeded;&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;    let mirroredReadsProcessedAfter = getMirroredReadsProcessedAsSecondary();&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;    assert.eq(mirroredReadsSucceeded, mirroredReadsProcessedAfter - mirroredReadsProcessedBefore);&lt;/span&gt;&lt;/pre&gt;
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						&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;
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&lt;p/&gt;
&lt;p&gt;Currently, the test captures FTDC on all members of the replica-set after completing the load operations, which makes the test sensitive to any temporary inaccuracies. This is the case to all linked failures, as shown by the following figure, where the number of processed reads on s0 drops to zero (due to a temporary issue in collected FTDC metrics) and goes back to 200 later on:&lt;br/&gt;
&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/423847/423847_ftdc.png&quot; width=&quot;100%&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;A possible solution is to use &lt;tt&gt;assert.soon&lt;/tt&gt; to ensure all mirrored operations are processed on secondaries, thus tolerating temporary issues with collecting FTDC.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2220828">SERVER-72421</key>
            <summary>Make `ftdc_mirrored_reads.js` wait for FTDC to converge </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="jason.chan@mongodb.com">Jason Chan</assignee>
                                    <reporter username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</reporter>
                        <labels>
                    </labels>
                <created>Thu, 29 Dec 2022 00:15:31 +0000</created>
                <updated>Sun, 29 Oct 2023 21:28:50 +0000</updated>
                            <resolved>Wed, 15 Feb 2023 14:18:06 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5188677" author="xgen-internal-githook" created="Sat, 11 Feb 2023 04:17:19 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@mongodb.com&apos;, &apos;username&apos;: &apos;jasonjhchan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72421&quot; title=&quot;Make `ftdc_mirrored_reads.js` wait for FTDC to converge &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72421&quot;&gt;&lt;del&gt;SERVER-72421&lt;/del&gt;&lt;/a&gt; Make `ftdc_mirrored_reads.js` wait for FTDC to converge&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0ce9ea723c7201e9789ad37ac79fa335cbbe5495&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0ce9ea723c7201e9789ad37ac79fa335cbbe5495&lt;/a&gt;&lt;/p&gt;</comment>
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                            <attachment id="423847" name="ftdc.png" size="197849" author="amirsaman.memaripour@mongodb.com" created="Thu, 29 Dec 2022 00:09:33 +0000"/>
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