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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-70993] Create new multiversion base suites for update fuzzers</title>
                <link>https://jira.mongodb.org/browse/SERVER-70993</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;del&gt;Some of our code sets binVersion for each node in ReplSetTest options.&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;&lt;del&gt;Here we take our node-specific options and merge them into options object:&lt;/del&gt;&lt;br/&gt;
&lt;del&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L2782&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L2782&lt;/a&gt;&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;&lt;del&gt;And in the next code block we override binVersion with &quot;latest&quot; or useRandomBinVersionsWithinReplicaSet: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L2795&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L2795&lt;/a&gt;&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;&lt;del&gt;We also state that setting both binVersion and useRandomBinVersionsWithinReplicaSet is incorrect, but we check that before we merge node-specific options:&lt;/del&gt;&lt;br/&gt;
&lt;del&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L2754&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L2754&lt;/a&gt;&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;&lt;del&gt;We also set FCV based on node-specific binVersion values:&lt;/del&gt;&#160;&lt;br/&gt;
&lt;del&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L1363&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L1363&lt;/a&gt;&lt;/del&gt;&lt;br/&gt;
&lt;del&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L1435&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/05518f9b480f4f65fc963b47ef4cf45c9e4807b5/src/mongo/shell/replsettest.js#L1435&lt;/a&gt;&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;&lt;del&gt;Which leads to an interesting situation when, for example, update fuzzers think they compare 6.0 with 6.2, but actually they compare 6.2 with and without 6.0 FCV.&lt;/del&gt;&lt;/p&gt;

&lt;p&gt;&lt;del&gt;It would be great if we can change the behaviour of useRandomBinVersionsWithinReplicaSet to use binVersion instead of &#8220;latest&#8221; and allow setting both fields.&lt;/del&gt;&lt;/p&gt;
&lt;hr /&gt;
&lt;p&gt;We have gone with the solution suggested in the comments. The above will be done in a separate ticket: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71320&quot; title=&quot;ReplSetTest silently ignores binVersion if it is specified inside nodes options&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71320&quot;&gt;&lt;del&gt;SERVER-71320&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2171566">SERVER-70993</key>
            <summary>Create new multiversion base suites for update fuzzers</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="tausif.rahman@mongodb.com">Tausif Rahman</assignee>
                                    <reporter username="ivan.fefer@mongodb.com">Ivan Fefer</reporter>
                        <labels>
                    </labels>
                <created>Tue, 1 Nov 2022 12:16:41 +0000</created>
                <updated>Sun, 29 Oct 2023 21:31:13 +0000</updated>
                            <resolved>Mon, 14 Nov 2022 17:30:55 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4979392" author="xgen-internal-githook" created="Mon, 14 Nov 2022 17:48:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Tausif Rahman&apos;, &apos;email&apos;: &apos;tausif.rahman@mongodb.com&apos;, &apos;username&apos;: &apos;trahman1318&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-70993&quot; title=&quot;Create new multiversion base suites for update fuzzers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-70993&quot;&gt;&lt;del&gt;SERVER-70993&lt;/del&gt;&lt;/a&gt; Create new multiversion base suites for update fuzzers&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/15691de19a50451bfe8d2132ac06a364dff8e0f3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/15691de19a50451bfe8d2132ac06a364dff8e0f3&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="2154450">SERVER-70353</issuekey>
        </issuelink>
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                            <issuelinktype id="10520">
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                                            <outwardlinks description="causes">
                                        <issuelink>
            <issuekey id="2298788">SERVER-75325</issuekey>
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