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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-43791] Secondary Replica Crushed with error message &quot;... too many open files..&quot; and initial sync also failed with the same error</title>
                <link>https://jira.mongodb.org/browse/SERVER-43791</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;One of secondary mongod host has crushed recently complaining &quot;..too many open files...&quot; and when we did try to do initial sync it also failed with the same error message.&#160;&#160;&lt;/p&gt;

&lt;p&gt;This the full information about mongod version and server :&lt;/p&gt;

&lt;p&gt;db version v3.4.21&lt;br/&gt;
git version: ba2e818de44c9a331ce09a624780a2bd841cf6e4&lt;br/&gt;
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013&lt;br/&gt;
allocator: tcmalloc&lt;br/&gt;
modules: enterprise&lt;br/&gt;
build environment:&lt;br/&gt;
 distmod: rhel70&lt;br/&gt;
 distarch: x86_64&lt;br/&gt;
 target_arch: x86_64&lt;/p&gt;</description>
                <environment></environment>
        <key id="957242">SERVER-43791</key>
            <summary>Secondary Replica Crushed with error message &quot;... too many open files..&quot; and initial sync also failed with the same error</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="carl.champain@mongodb.com">Carl Champain</assignee>
                                    <reporter username="mmamo@costco.com">Miheretu Mamo</reporter>
                        <labels>
                    </labels>
                <created>Thu, 3 Oct 2019 02:54:30 +0000</created>
                <updated>Thu, 3 Oct 2019 18:01:02 +0000</updated>
                            <resolved>Thu, 3 Oct 2019 17:05:27 +0000</resolved>
                                    <version>3.4.20</version>
                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2464093" author="mmamo@costco.com" created="Thu, 3 Oct 2019 18:01:02 +0000"  >&lt;p&gt;Thanks Carl. We will increase open file limits to see if this resolves. I am surprised why the other secondary is not affected given both have the same work load and configuration.&lt;/p&gt;</comment>
                            <comment id="2463499" author="carl.champain" created="Thu, 3 Oct 2019 15:10:50 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=mmamo%40costco.com&quot; class=&quot;user-hover&quot; rel=&quot;mmamo@costco.com&quot;&gt;mmamo@costco.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for the report.&lt;br/&gt;
Looking at the log you provided, it appears that you&apos;ve hit the open file limit on your system. You can &lt;a href=&quot;https://docs.mongodb.com/manual/reference/ulimit/#recommended-ulimit-settings&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;increase to a larger number of files&lt;/a&gt; to avoid hitting this error. &lt;/p&gt;

&lt;p&gt;I&apos;m going to close this ticket as a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32423&quot; title=&quot;mongod crash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32423&quot;&gt;&lt;del&gt;SERVER-32423&lt;/del&gt;&lt;/a&gt;. 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;https://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;https://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-user group.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Carl&lt;/p&gt;</comment>
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                            <attachment id="232486" name="mongodlog.txt" size="142519" author="mmamo@costco.com" created="Thu, 3 Oct 2019 02:39:53 +0000"/>
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