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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-31081] Too many open file descriptors not handled gracefully</title>
                <link>https://jira.mongodb.org/browse/SERVER-31081</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;File descriptors are used for multiple purposes, largely socket connections and WiredTiger tables, but also journal files, ftdc files, log files, and so on. When mongod runs out of file descriptors by hitting the RLIMIT_NOFILES multiple internal failures can occur:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2017-09-13T14:05:25.125-0400 I NETWORK  [thread1] Listener: accept() returns -1 Too many open files&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2017-09-13T14:05:25.125-0400 E NETWORK  [thread1] Out of file descriptors. Waiting one second before trying to accept more connections.&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;...&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2017-09-13T14:05:26.000-0400 I -        [ftdc] Assertion: 13538:couldn&apos;t open [/proc/12839/stat] Too many open files src/mongo/util/processinfo_linux.cpp 74&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2017-09-13T14:05:26.000-0400 W FTDC     [ftdc] Uncaught exception in &apos;Location13538: couldn&apos;t open [/proc/12839/stat] Too many open files&apos; in full-time diagnostic data capture subsystem. Shutting down the full-time diagnostic data capture subsystem.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;...&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2017-09-13T14:05:30.427-0400 E STORAGE  [conn5] WiredTiger error (24) [1505325930:427737][12839:0x7fc987931700], WT_SESSION.commit_transaction: /ssd/db/./r0/journal: directory-list: opendir: Too many open files&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;After this occurs the node is either not operational, or is operating in a degraded state, but no failover has occurred. We should either&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;bound use of file descriptors for new connections and new tables by refusing new connections and failing new table creation, or&lt;/li&gt;
	&lt;li&gt;detect this condition reliably and abort to trigger failover&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Note: currently new connections are limited to 80% of RLIMIT_NOFILE which only partially mitigates this issue because the use of remaining file descriptors for WT tables is not bounded.&lt;/p&gt;</description>
                <environment></environment>
        <key id="427169">SERVER-31081</key>
            <summary>Too many open file descriptors not handled gracefully</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                            <label>sa-remove-fv-backlog-22</label>
                    </labels>
                <created>Wed, 13 Sep 2017 18:21:09 +0000</created>
                <updated>Mon, 8 Jan 2024 15:23:07 +0000</updated>
                                                                            <component>Internal Code</component>
                                        <votes>29</votes>
                                    <watches>36</watches>
                                                                                                                <comments>
                            <comment id="1714082" author="xgen-internal-githook" created="Tue, 31 Oct 2017 21:49:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;adam.martin@10gen.com&apos;, &apos;name&apos;: &apos;ADAM David Alan Martin&apos;, &apos;username&apos;: &apos;adamlsd&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31081&quot; title=&quot;Too many open file descriptors not handled gracefully&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31081&quot;&gt;SERVER-31081&lt;/a&gt; Fix Lint again.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1d560ef0ddf4cb410f8cfe98884ddcaed5f40dfa&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1d560ef0ddf4cb410f8cfe98884ddcaed5f40dfa&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Should be attached to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31061&quot; title=&quot;Make Mongo Shell handle `mongodb+srv://` style URIs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31061&quot;&gt;&lt;del&gt;SERVER-31061&lt;/del&gt;&lt;/a&gt;.  Typo.&lt;/p&gt;</comment>
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            <issuekey id="615933">SERVER-37521</issuekey>
        </issuelink>
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