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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>
    </build-info>


<item>
            <title>[SERVER-8007] mongod segfaulted</title>
                <link>https://jira.mongodb.org/browse/SERVER-8007</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;mongod segfaults as seen in the log snippet:&lt;/p&gt;

&lt;p&gt;Dec 19 14:26:49  abrt&lt;span class=&quot;error&quot;&gt;&amp;#91;3665&amp;#93;&lt;/span&gt;: Saved core dump of pid 24104 (/usr/bin/mongod) to /var/spool/abrt/ccpp-2012-12-19-14:26:38-24104 (1784872960 bytes)&lt;br/&gt;
Dec 19 14:26:49  abrtd: Directory &apos;ccpp-2012-12-19-14:26:38-24104&apos; creation detected&lt;br/&gt;
Dec 19 14:26:50  abrtd: Package &apos;mongo-10gen-server&apos; isn&apos;t signed with proper key&lt;br/&gt;
Dec 19 14:26:50  abrtd: &apos;post-create&apos; on &apos;/var/spool/abrt/ccpp-2012-12-19-14:26:38-24104&apos; exited with 1&lt;br/&gt;
Dec 19 14:26:50  abrtd: Corrupted or bad directory /var/spool/abrt/ccpp-2012-12-19-14:26:38-24104, deleting&lt;/p&gt;

&lt;p&gt;Around this time a number of issues and errors are seen in mongod.log which should have recovered and could be caused by possible issues in AWS or mongod itself we are currently unsure so hints here would also be great.&lt;/p&gt;</description>
                <environment>CentOS release 6.3 (Final) running in AWS</environment>
        <key id="60125">SERVER-8007</key>
            <summary>mongod segfaulted</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="9">Done</resolution>
                                        <assignee username="barrie">Barrie Segal</assignee>
                                    <reporter username="alburrel">Alister Burrell</reporter>
                        <labels>
                            <label>crash</label>
                            <label>mongod</label>
                            <label>nh-240</label>
                            <label>segfault</label>
                    </labels>
                <created>Fri, 21 Dec 2012 11:18:55 +0000</created>
                <updated>Mon, 8 Apr 2013 13:52:02 +0000</updated>
                            <resolved>Mon, 8 Apr 2013 13:52:02 +0000</resolved>
                                    <version>2.2.2</version>
                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="308413" author="alburrel" created="Mon, 8 Apr 2013 10:51:09 +0000"  >&lt;p&gt;Barrie,&lt;/p&gt;

&lt;p&gt;We haven&apos;t managed to replicatate this since the first occurance even with the same settings as we had previously.  I think you can probably close but if we see this again we will take full logs and re open a case.&lt;/p&gt;</comment>
                            <comment id="307190" author="barrie" created="Fri, 5 Apr 2013 22:51:01 +0000"  >&lt;p&gt;Hi Alister,&lt;/p&gt;

&lt;p&gt;Are you still running into this issue?&lt;/p&gt;

&lt;p&gt;Barrie &lt;/p&gt;</comment>
                            <comment id="300080" author="barrie" created="Wed, 27 Mar 2013 18:31:27 +0000"  >&lt;p&gt;Alister,&lt;/p&gt;

&lt;p&gt;It looks like your open files and processes limits are too low. We recommend open files to be 64000 and processes to be 32000. &lt;/p&gt;

&lt;p&gt;These recommendations (and others) can be found in our documentation &lt;a href=&quot;http://docs.mongodb.org/manual/administration/ulimit/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Barrie &lt;/p&gt;</comment>
                            <comment id="262996" author="alburrel" created="Mon, 11 Feb 2013 10:52:53 +0000"  >&lt;p&gt;Our config hosts:&lt;/p&gt;

&lt;p&gt;Limit                     Soft Limit           Hard Limit           Units     &lt;br/&gt;
Max cpu time              unlimited            unlimited            seconds   &lt;br/&gt;
Max file size             unlimited            unlimited            bytes     &lt;br/&gt;
Max data size             unlimited            unlimited            bytes     &lt;br/&gt;
Max stack size            10485760             unlimited            bytes     &lt;br/&gt;
Max core file size        0                    0                    bytes     &lt;br/&gt;
Max resident set          unlimited            unlimited            bytes     &lt;br/&gt;
Max processes             1024                 unlimited            processes &lt;br/&gt;
Max open files            12000                12000                files     &lt;br/&gt;
Max locked memory         65536                65536                bytes     &lt;br/&gt;
Max address space         unlimited            unlimited            bytes     &lt;br/&gt;
Max file locks            unlimited            unlimited            locks     &lt;br/&gt;
Max pending signals       12868                12868                signals   &lt;br/&gt;
Max msgqueue size         819200               819200               bytes     &lt;br/&gt;
Max nice priority         0                    0                    &lt;br/&gt;
Max realtime priority     0                    0                    &lt;br/&gt;
Max realtime timeout      unlimited            unlimited            us       &lt;/p&gt;

&lt;p&gt;Our shards:&lt;/p&gt;

&lt;p&gt;Limit                     Soft Limit           Hard Limit           Units     &lt;br/&gt;
Max cpu time              unlimited            unlimited            seconds   &lt;br/&gt;
Max file size             unlimited            unlimited            bytes     &lt;br/&gt;
Max data size             unlimited            unlimited            bytes     &lt;br/&gt;
Max stack size            10485760             unlimited            bytes     &lt;br/&gt;
Max core file size        0                    0                    bytes     &lt;br/&gt;
Max resident set          unlimited            unlimited            bytes     &lt;br/&gt;
Max processes             1024                 unlimited            processes &lt;br/&gt;
Max open files            12000                12000                files     &lt;br/&gt;
Max locked memory         65536                65536                bytes     &lt;br/&gt;
Max address space         unlimited            unlimited            bytes     &lt;br/&gt;
Max file locks            unlimited            unlimited            locks     &lt;br/&gt;
Max pending signals       59359                59359                signals   &lt;br/&gt;
Max msgqueue size         819200               819200               bytes     &lt;br/&gt;
Max nice priority         0                    0                    &lt;br/&gt;
Max realtime priority     0                    0                    &lt;br/&gt;
Max realtime timeout      unlimited            unlimited            us        &lt;/p&gt;</comment>
                            <comment id="261439" author="barrie" created="Fri, 8 Feb 2013 23:03:29 +0000"  >&lt;p&gt;Hi Alister,&lt;/p&gt;

&lt;p&gt;Can you paste the output of: &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;
		&lt;tbody &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;  margin-top: 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;$ cat /proc/&amp;lt;pid&amp;gt;/limits&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt; substituting in the mongodb process ID?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;/p&gt;

&lt;p&gt;Barrie &lt;/p&gt;</comment>
                            <comment id="240386" author="alburrel" created="Tue, 15 Jan 2013 14:27:57 +0000"  >&lt;p&gt;Looks like the init script sets ulimit to 12000, do we want to increase it further?&lt;/p&gt;</comment>
                            <comment id="231098" author="barrie" created="Fri, 4 Jan 2013 18:31:22 +0000"  >&lt;p&gt;Alister,&lt;/p&gt;

&lt;p&gt;Did you try increasing the ulimit?&lt;/p&gt;

&lt;p&gt;Barrie &lt;/p&gt;</comment>
                            <comment id="222010" author="eliot" created="Sat, 22 Dec 2012 06:28:45 +0000"  >&lt;p&gt;Looks like the ulimit is too lower (default of 1024).&lt;br/&gt;
Can you try increasing that?&lt;br/&gt;
See: &lt;a href=&quot;http://docs.mongodb.org/manual/administration/ulimit/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/administration/ulimit/&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="22775" name="mongod.log" size="1427643" author="alburrel" created="Fri, 21 Dec 2012 11:18:55 +0000"/>
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