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    <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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            <title>[DOCS-7535] Cloud Manager &quot;Host has low open file limits&quot; page is extremely confusing</title>
                <link>https://jira.mongodb.org/browse/DOCS-7535</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://docs.cloud.mongodb.com/troubleshooting/#receive-host-has-low-open-file-limits-or-too-many-open-files-error-messages&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.cloud.mongodb.com/troubleshooting/#receive-host-has-low-open-file-limits-or-too-many-open-files-error-messages&lt;/a&gt;&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;These errors are not generated by the mongos instance and, therefore, will not appear in mongos log files.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;Why are mongoses singled out when this affects mongods as well?&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;compares the number of open file descriptors and connections to the maximum connections limit&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;It does not look at the number of file descriptors, only the number of connections.  This is trying (and failing) to say that the &quot;max open fds&quot; ulimit is what determines the &quot;available&quot; connections as reported by the server.&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;In ping documents&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;Pings have nothing to do with it, apart from being where a user can find the evidence if they want.  This should just talk about serverStatus, since that&apos;s where the information comes from.&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;its serverStatus.connections values, if the sum of the current value plus the available value&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;Not clear that &quot;current&quot; and &quot;available&quot; are fields inside the &quot;serverStatus.connections&quot; sub-document.&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;is less than the maxConns configuration value&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;It&apos;s now net.maxIncomingConnections.&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;To prevent this error, we recommend you set ulimit open files to 64000. We also recommend setting the maxConns command in the mongo shell to at least the recommended settings.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;Remove &quot;at least&quot; &amp;#8212; having maxConns which is significantly higher than the ulimits is a great way to cause this message.&lt;/p&gt;

&lt;p&gt;These are all in addition to the issues pointed out in MMS-2416 and MMS-2541.&lt;/p&gt;</description>
                <environment></environment>
        <key id="275984">DOCS-7535</key>
            <summary>Cloud Manager &quot;Host has low open file limits&quot; page is extremely confusing</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="-1">Unassigned</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                    </labels>
                <created>Wed, 30 Mar 2016 12:13:19 +0000</created>
                <updated>Wed, 11 Jan 2017 21:50:24 +0000</updated>
                            <resolved>Wed, 27 Jul 2016 19:03:54 +0000</resolved>
                                                    <fixVersion>01112017-cleanup</fixVersion>
                                    <component>Cloud Manager</component>
                    <component>Ops Manager</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
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