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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-37240] Enable dbhash background thread for enableMajorityReadConcern:false variant</title>
                <link>https://jira.mongodb.org/browse/SERVER-37240</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is follow-on work for&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36982&quot; title=&quot;Reintroduce enableMajorityReadConcern:false server parameter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36982&quot;&gt;&lt;del&gt;SERVER-36982&lt;/del&gt;&lt;/a&gt; and&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37227&quot; title=&quot;Reintroduce enableMajorityReadConcern:false server parameter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37227&quot;&gt;&lt;del&gt;SERVER-37227&lt;/del&gt;&lt;/a&gt;. We disabled the dbhash background thread for &lt;tt&gt;enableMajorityReadConcern:false&lt;/tt&gt;,&#160;since the thread &lt;a href=&quot;https://github.com/mongodb/mongo/blob/64672e68a25e1c4c53a9e1e974036b02fdda2cc5/jstests/hooks/run_check_repl_dbhash_background.js#L139&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;performs a majority &lt;tt&gt;afterClusterTime&lt;/tt&gt; read&lt;/a&gt;, in order to check that the secondary has applied up to the chosen cluster time and advanced its majority commit point. Instead, we can run &lt;tt&gt;replSetGetStatus&lt;/tt&gt; in an &lt;tt&gt;assert.soon()&lt;/tt&gt; loop and check the &lt;tt&gt;lastCommittedOpTime&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;We plan to disable &lt;tt&gt;atClusterTime&lt;/tt&gt; with &lt;tt&gt;enableMajorityReadConcern:false&lt;/tt&gt;, since we aggressively forget history, but we can leave it on when test commands are enabled. The dbhash background thread uses the &lt;tt&gt;WTPreserveSnapshotHistoryIndefinitely&lt;/tt&gt; failpoint to ensure history is preserved.&lt;/p&gt;</description>
                <environment></environment>
        <key id="607804">SERVER-37240</key>
            <summary>Enable dbhash background thread for enableMajorityReadConcern:false variant</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="vesselina.ratcheva@mongodb.com">Vesselina Ratcheva</assignee>
                                    <reporter username="tess.avitabile@mongodb.com">Tess Avitabile</reporter>
                        <labels>
                    </labels>
                <created>Thu, 20 Sep 2018 20:43:52 +0000</created>
                <updated>Sun, 29 Oct 2023 22:28:02 +0000</updated>
                            <resolved>Fri, 14 Dec 2018 19:50:11 +0000</resolved>
                                                    <fixVersion>4.0.6</fixVersion>
                    <fixVersion>4.1.7</fixVersion>
                                    <component>Replication</component>
                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2114512" author="xgen-internal-githook" created="Mon, 14 Jan 2019 18:45:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;vessy-mongodb&apos;, &apos;email&apos;: &apos;vesselina.ratcheva@10gen.com&apos;, &apos;name&apos;: &apos;Vesselina Ratcheva&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37240&quot; title=&quot;Enable dbhash background thread for enableMajorityReadConcern:false variant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37240&quot;&gt;&lt;del&gt;SERVER-37240&lt;/del&gt;&lt;/a&gt; Enable dbhash background thread for enableMajorityReadConcern:false variant&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 0991709cf60677b183cc0362e432c095d9ed185f)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/26034f8f214194484c6eefe0360740f52febdda6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/26034f8f214194484c6eefe0360740f52febdda6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2091355" author="xgen-internal-githook" created="Fri, 14 Dec 2018 19:48:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;vessy-mongodb&apos;, &apos;email&apos;: &apos;vesselina.ratcheva@10gen.com&apos;, &apos;name&apos;: &apos;Vesselina Ratcheva&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37240&quot; title=&quot;Enable dbhash background thread for enableMajorityReadConcern:false variant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37240&quot;&gt;&lt;del&gt;SERVER-37240&lt;/del&gt;&lt;/a&gt; Enable dbhash background thread for enableMajorityReadConcern:false variant&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0991709cf60677b183cc0362e432c095d9ed185f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0991709cf60677b183cc0362e432c095d9ed185f&lt;/a&gt;&lt;/p&gt;</comment>
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