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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-46546] Only seed the RNG once in sharding_multiversion tests</title>
                <link>https://jira.mongodb.org/browse/SERVER-46546</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, in the sharding_multiversion suite, we are seeding the random number generator for each replica set rather than seeding it only once. This makes reproducing the tests in sharding_multiversion more difficult. &lt;br/&gt;
This line &lt;a href=&quot;https://github.com/mongodb/mongo/blob/933539d9cf046e1803718f998e95abcc1ec960f9/src/mongo/shell/replsettest.js#L3162&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; should instead be something like:&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;
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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;  margin-top: 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;self.seedRandomNumberGenerator = opts.hasOwnProperty(&apos;seedRandomNumberGenerator&apos;) ? opts.seedRandomNumberGenerator : true;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Additionally, the check in &lt;tt&gt;shardingtest.js&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/83854e39d2904b5d4a6e4ee1f9b4fedaa4df85a5/src/mongo/shell/shardingtest.js#L1218&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; should be checking &lt;tt&gt;jsTest.options().useRandomBinVersionsWithinReplicaSet&lt;/tt&gt; instead of the no longer used &lt;tt&gt;jsTest.options().randomBinVersions&lt;/tt&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1212570">SERVER-46546</key>
            <summary>Only seed the RNG once in sharding_multiversion tests</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="jason.chan@mongodb.com">Jason Chan</reporter>
                        <labels>
                    </labels>
                <created>Mon, 2 Mar 2020 20:59:27 +0000</created>
                <updated>Sun, 29 Oct 2023 22:11:26 +0000</updated>
                            <resolved>Tue, 3 Mar 2020 16:19:37 +0000</resolved>
                                    <version>4.3 Desired</version>
                                    <fixVersion>4.3.5</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2934349" author="william.schultz" created="Wed, 4 Mar 2020 15:13:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jason.chan&quot; class=&quot;user-hover&quot; rel=&quot;jason.chan&quot;&gt;jason.chan&lt;/a&gt; I feel that this may be a more general issue whenever a test starts up multiple ReplSetTest instances. I recently encountered this in the &lt;tt&gt;disallow_adding_initialized_node1.js&lt;/tt&gt; test e.g.&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;
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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;  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:disallow_adding_initialized_node1] 2020-03-04T05:54:07.171+0000 Starting JSTest jstests/replsets/disallow_adding_initialized_node1.js...&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:disallow_adding_initialized_node1] 2020-03-04T05:54:07.614+0000 ReplSetTest starting set &apos;disallow_adding_initialized_node1&apos;&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:disallow_adding_initialized_node1] 2020-03-04T05:54:07.615+0000 setting random seed: -5798830423199588000&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:disallow_adding_initialized_node1] 2020-03-04T05:54:08.906+0000 ReplSetTest starting set &apos;disallow_adding_initialized_node1&apos;&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:disallow_adding_initialized_node1] 2020-03-04T05:54:08.907+0000 setting random seed: 7737753121339076000&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;Ideally, it seems that we should only need to set a random seed once, globally, for each mongo shell process that we start up. I wonder if &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6aab3ab5b6c20dd46cb659e8eaefb597f2b53263/src/mongo/shell/replsettest.js#L612:L618&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; we could set a seed only if it hasn&apos;t already been set previously.&lt;/p&gt;</comment>
                            <comment id="2932416" author="xgen-internal-githook" created="Tue, 3 Mar 2020 16:18:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;jasonjhchan&apos;, &apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46546&quot; title=&quot;Only seed the RNG once in sharding_multiversion tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46546&quot;&gt;&lt;del&gt;SERVER-46546&lt;/del&gt;&lt;/a&gt; Only seed the RNG once in sharding_multiversion tests&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7fb62bff8bffb24dac650d17309b142f049908c1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7fb62bff8bffb24dac650d17309b142f049908c1&lt;/a&gt;&lt;/p&gt;</comment>
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