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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-3693] mongod won&apos;t become primary if it&apos;s fsync locked</title>
                <link>https://jira.mongodb.org/browse/SERVER-3693</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If a secondary is fsync locked, and the primary goes down, that secondary can&apos;t become primary until it is unlocked.  If all secondaries are locked, this can lead you to be without a primary.&lt;/p&gt;</description>
                <environment></environment>
        <key id="21536">SERVER-3693</key>
            <summary>mongod won&apos;t become primary if it&apos;s fsync locked</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="9">Done</resolution>
                                        <assignee username="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                            <label>replication</label>
                    </labels>
                <created>Thu, 25 Aug 2011 23:42:11 +0000</created>
                <updated>Fri, 15 Feb 2013 15:06:22 +0000</updated>
                            <resolved>Tue, 18 Sep 2012 05:31:47 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="85366" author="dwight_10gen" created="Sat, 4 Feb 2012 22:36:22 +0000"  >&lt;p&gt;yes that behavior is correct&lt;/p&gt;

&lt;p&gt;but does voting require a lock? even a read lock would be problematic in the current version as a write acquisition can stop everything (that is being fixed).&lt;/p&gt;

&lt;p&gt;reopening until confirmed it doesn&apos;t.  a one-liner test would be assert( !dbMutex.isLocked() ) at the line where we vote&lt;/p&gt;</comment>
                            <comment id="50821" author="eliot" created="Thu, 25 Aug 2011 23:44:41 +0000"  >&lt;p&gt;That seems like completely correct behavior to me.&lt;/p&gt;</comment>
                            <comment id="50820" author="spencer" created="Thu, 25 Aug 2011 23:44:36 +0000"  >&lt;p&gt;This might actually be the desired behavior, at least as long as trying to write to locked server blocks reads (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1423&quot; title=&quot;reads often aren&amp;#39;t possible while in fsync and lock mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1423&quot;&gt;&lt;del&gt;SERVER-1423&lt;/del&gt;&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;The only case I can think of where you would want a locked secondary to become primary is if you&apos;re doing reads without slaveOk, and no writes.&lt;/p&gt;</comment>
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