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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-47489] replica_set_multiversion tests can depend on standalones illegally downgrading</title>
                <link>https://jira.mongodb.org/browse/SERVER-47489</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;replica_set_multiversion&lt;/tt&gt; will randomly choose between &quot;latest&quot; and &quot;last-stable&quot; when starting up a mongod instance. The passthrough logic is smart enough to downgrade the FCV and clean shutdown, but that&apos;s not sufficient for ensuring &quot;last-stable&quot; is always able to start up in more complicated restart sequences. Consider the following (using 4.4/4.2 as an example):&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Start MongoDB 4.4 + ReplSet&lt;/li&gt;
	&lt;li&gt;SetFCV 4.2&lt;/li&gt;
	&lt;li&gt;Shutdown (MongoDB 4.2 can restart on these data files)&lt;/li&gt;
	&lt;li&gt;Start MongoDB 4.4 + Standalone&lt;/li&gt;
	&lt;li&gt;Shutdown (MongoDB 4.2 &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6ba8fb61e5f323d0211b39c74aded5df86bbba83/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp#L154-L165&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;can &lt;b&gt;not&lt;/b&gt; restart&lt;/a&gt; on these data files)&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="1311782">SERVER-47489</key>
            <summary>replica_set_multiversion tests can depend on standalones illegally downgrading</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="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Sat, 11 Apr 2020 02:01:29 +0000</created>
                <updated>Sun, 29 Oct 2023 22:09:37 +0000</updated>
                            <resolved>Fri, 17 Apr 2020 18:54:51 +0000</resolved>
                                                    <fixVersion>4.4.0-rc2</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3050135" author="xgen-internal-githook" created="Tue, 21 Apr 2020 23:17:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@10gen.com&apos;, &apos;username&apos;: &apos;jasonjhchan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47489&quot; title=&quot;replica_set_multiversion tests can depend on standalones illegally downgrading&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47489&quot;&gt;&lt;del&gt;SERVER-47489&lt;/del&gt;&lt;/a&gt; Blacklist standalone_replication_recovery_idempotent.js and temp_namespace_restart_as_standalone from multiversion testing&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 3c3661f83ab419b533b7ed8cfaede2fc8ba7a780)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b38c6815cee932098722b72430b3237da3fe312a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b38c6815cee932098722b72430b3237da3fe312a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3045318" author="xgen-internal-githook" created="Fri, 17 Apr 2020 18:53:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@10gen.com&apos;, &apos;username&apos;: &apos;jasonjhchan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47489&quot; title=&quot;replica_set_multiversion tests can depend on standalones illegally downgrading&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47489&quot;&gt;&lt;del&gt;SERVER-47489&lt;/del&gt;&lt;/a&gt; Blacklist standalone_replication_recovery_idempotent.js and temp_namespace_restart_as_standalone from multiversion testing&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3c3661f83ab419b533b7ed8cfaede2fc8ba7a780&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3c3661f83ab419b533b7ed8cfaede2fc8ba7a780&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3044761" author="jason.chan" created="Fri, 17 Apr 2020 15:34:51 +0000"  >&lt;p&gt;This ticket will blacklist both standalone_replication_recovery_idempotent.js and temp_namespace_restart_as_standalone from multiversion testing.&lt;/p&gt;</comment>
                            <comment id="3036569" author="judah.schvimer" created="Mon, 13 Apr 2020 11:42:48 +0000"  >&lt;p&gt;I support just blacklisting the test to avoid a bunch of extra complexity.&lt;/p&gt;</comment>
                            <comment id="3035899" author="daniel.gottlieb@10gen.com" created="Sat, 11 Apr 2020 18:23:55 +0000"  >&lt;p&gt;Or just omit &lt;tt&gt;standalone_replication_recovery_idempotent.js&lt;/tt&gt; from being run &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
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