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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-35625] Remove 3.6-specific WiredTiger compatibility handling</title>
                <link>https://jira.mongodb.org/browse/SERVER-35625</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The WiredTiger compatibility handling that was added as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32590&quot; title=&quot;RTT 3.6&amp;lt;-&amp;gt;4.0 upgrade/downgrade.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32590&quot;&gt;&lt;del&gt;SERVER-32590&lt;/del&gt;&lt;/a&gt; and was specific to 3.6 should be removed. Per the discussion in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35117&quot; title=&quot;Enumerate and remove Storage-related FeatureCompatibilityVersion 3.6-dependent code and tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35117&quot;&gt;&lt;del&gt;SERVER-35117&lt;/del&gt;&lt;/a&gt;, this includes the following:&lt;/p&gt;

&lt;p&gt;For the purposes of unblocking this work, we should &lt;tt&gt;set compatibility=(require_min=&quot;3.1.0&quot;)&lt;/tt&gt; to determine whether starting with FCV=4.0. References to earlier WT versions should be removed. Since &lt;tt&gt;compatibility&lt;/tt&gt; is omitted to enable the latest behavior in WiredTiger, none of these changes need to wait for the WiredTiger version to be bumped.&lt;/p&gt;

&lt;p&gt;When downgrading (to 4.0) as part of clean shutdown, if downgrading:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;we should remove any use_timestamp configuration to WT_CONNECTION::close (the default behavior should be correct for 4.1 and above)&lt;/li&gt;
	&lt;li&gt;we should remove the loop that calls WiredTigerUtil::setTableLogging&lt;/li&gt;
	&lt;li&gt;we should not need to close / reopen and then close again.&lt;/li&gt;
	&lt;li&gt;Instead, it should be sufficient to call _conn-&amp;gt;reconfigure with compatibility=(release=3.1) with just one call to _conn-&amp;gt;close&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="560154">SERVER-35625</key>
            <summary>Remove 3.6-specific WiredTiger compatibility handling</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="maria.vankeulen@mongodb.com">Maria van Keulen</assignee>
                                    <reporter username="maria.vankeulen@mongodb.com">Maria van Keulen</reporter>
                        <labels>
                    </labels>
                <created>Fri, 15 Jun 2018 18:32:47 +0000</created>
                <updated>Sun, 29 Oct 2023 22:30:44 +0000</updated>
                            <resolved>Mon, 18 Jun 2018 21:30:43 +0000</resolved>
                                                    <fixVersion>4.1.1</fixVersion>
                                    <component>Upgrade/Downgrade</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1924198" author="xgen-internal-githook" created="Mon, 18 Jun 2018 21:09:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;mvankeulen94&apos;, &apos;name&apos;: &apos;Maria van Keulen&apos;, &apos;email&apos;: &apos;maria@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35625&quot; title=&quot;Remove 3.6-specific WiredTiger compatibility handling&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35625&quot;&gt;&lt;del&gt;SERVER-35625&lt;/del&gt;&lt;/a&gt; Remove 3.6-specific WiredTiger file handling&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/013b82bf5f58bd7de8ae2f4d28d24f82afa22e64&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/013b82bf5f58bd7de8ae2f4d28d24f82afa22e64&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1922317" author="maria.vankeulen" created="Fri, 15 Jun 2018 20:27:18 +0000"  >&lt;p&gt;Due to arbiter FCV semantics on 4.0, the WiredTiger files are &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r4.0.0-rc5/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp#L147-L148&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;downgraded to release compatibility 2.9&lt;/a&gt; on clean shutdown. In order to allow arbiters to start up with 4.2 binaries, the WiredTiger compatibility check must accommodate 2.9. &lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="547126">SERVER-35117</issuekey>
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            <issuelink>
            <issuekey id="560248">SERVER-35631</issuekey>
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