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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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<item>
            <title>[SERVER-27530] Secondary showing all queries waitingForLock = true intermittently once in a while</title>
                <link>https://jira.mongodb.org/browse/SERVER-27530</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;We are using Mongo 3.0.4 with 3 member replica set in production. Our primary and one of the secondary is in one AWS zone(A) and other secondary is in different zone (B). All the queries have proper index and works fine otherwise. The problem is once in a while, we see high load on one of the secondary in B zone and when we check the currentOp, all the queries are &lt;b&gt;waitingForLock : true&lt;/b&gt;. We are using read preference as &lt;b&gt;&quot;secondary preferred&quot;&lt;/b&gt; in our application.&lt;/p&gt;

&lt;p&gt;After looking at different forums, is there a possibility that the replica worker thread is taking long time to sync and acquire the lock? Is there any issue with the particular version? Should we upgrade it to the latest version?&lt;/p&gt;</description>
                <environment></environment>
        <key id="341322">SERVER-27530</key>
            <summary>Secondary showing all queries waitingForLock = true intermittently once in a while</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="sharma.vineet86">Vineet Sharma</reporter>
                        <labels>
                    </labels>
                <created>Wed, 28 Dec 2016 07:11:20 +0000</created>
                <updated>Tue, 3 Jan 2017 17:29:52 +0000</updated>
                            <resolved>Tue, 3 Jan 2017 17:29:52 +0000</resolved>
                                    <version>3.0.4</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1468338" author="thomas.schubert" created="Tue, 3 Jan 2017 17:29:52 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=sharma.vineet86&quot; class=&quot;user-hover&quot; rel=&quot;sharma.vineet86&quot;&gt;sharma.vineet86&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for your report. Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-users group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. A question like this involving more discussion would be best posted on the mongodb-users group.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
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