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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-31158] voting inMemory nodes should refuse to join replica sets that have writeConcernMajorityJournalDefault set to true</title>
                <link>https://jira.mongodb.org/browse/SERVER-31158</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As per the docs, you must set writeConcernMajorityJournalDefault to false if you are running voting, but non-journaling, nodes in your replica set:&lt;br/&gt;
&lt;a href=&quot;https://docs.mongodb.com/manual/reference/replica-configuration/#rsconf.writeConcernMajorityJournalDefault&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/reference/replica-configuration/#rsconf.writeConcernMajorityJournalDefault&lt;/a&gt;&lt;br/&gt;
If you do not do this, the effect will be that your majority writes may hang if a majority of nodes includes a non-journaling node.&lt;br/&gt;
A worse effect is that if you also use --enableMajorityReadConcern, the commit level will never advance, and so the majority snapshot never advances.  This can eventually fill up cache memory with write history.&lt;/p&gt;</description>
                <environment></environment>
        <key id="429356">SERVER-31158</key>
            <summary>voting inMemory nodes should refuse to join replica sets that have writeConcernMajorityJournalDefault set to true</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Tue, 19 Sep 2017 17:29:58 +0000</created>
                <updated>Tue, 6 Dec 2022 03:51:44 +0000</updated>
                            <resolved>Thu, 9 Apr 2020 05:42:46 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3032360" author="siyuan.zhou@10gen.com" created="Thu, 9 Apr 2020 05:42:32 +0000"  >&lt;p&gt;I agree fassert on installing a config that is incompatible with the in-memory node is a clean idea. However I&apos;m concerned that adding the constraint in 4.6 would fail upgrade surprisingly. Given that we&apos;ve already added the warning and the worst case is to fail in another loud way, I&apos;d lean towards to closing the ticket as &quot;Won&apos;t Fix&quot;.&lt;/p&gt;</comment>
                            <comment id="1678108" author="milkie" created="Wed, 20 Sep 2017 20:40:13 +0000"  >&lt;p&gt;I was imagining a node might refuse to accept a config where it was a voting member and the flag was set to true.  That would have other repercussions of course.&lt;/p&gt;

&lt;p&gt;I&apos;m fine with the startup warning as 3.5 required.  Feel free to close this ticket or backlog it in the meantime.&lt;/p&gt;</comment>
                            <comment id="1678061" author="spencer" created="Wed, 20 Sep 2017 19:54:22 +0000"  >&lt;p&gt;Our plan for handling this was just to add a startupWarning on the inMemory node in this configuration (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29649&quot; title=&quot;Add startupWarning when a replset node is running with --nojournal but hasn&amp;#39;t set writeConcernMajorityJournalDefault to false&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29649&quot;&gt;&lt;del&gt;SERVER-29649&lt;/del&gt;&lt;/a&gt;).  It&apos;s currently in 3.5 Desired but that&apos;s because I forgot that with read concern majority always on in 3.6 the situation gets worse.  If we bumped that up to 3.5 Required do you think that&apos;d be sufficient?&lt;/p&gt;</comment>
                            <comment id="1678059" author="spencer" created="Wed, 20 Sep 2017 19:53:33 +0000"  >&lt;p&gt;I don&apos;t really understand this request.  If a secondary is running the inMemory storage engine how would it force the primary to change its commit level calculation.&lt;/p&gt;</comment>
                            <comment id="1677986" author="milkie" created="Wed, 20 Sep 2017 18:51:57 +0000"  >&lt;p&gt;Alternatively, an inMemory storage engine node could simply report all writes as durable even though they are not, for the purposes of replica set update position notifications.&lt;/p&gt;</comment>
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            <issuekey id="394278">SERVER-29649</issuekey>
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            <issuekey id="656681">SERVER-38685</issuekey>
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