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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-23481] How to enable mongod coredump?</title>
                <link>https://jira.mongodb.org/browse/SERVER-23481</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I want to generate corefile when mongod received SIGSEGV to help debuging, but even I comment the signal binding code and recompile, mongod cannot dump corefile when SIGSEGV received, can you guys tell me why? Thanks a lot. &lt;/p&gt;

&lt;p&gt;diff src/mongo/util/signal_handlers_synchronous.cpp&lt;/p&gt;

&lt;p/&gt;
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&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;p/&gt;

&lt;p&gt;PS: Another program compiler by the same gcc on the same host can generate corefile when SIGSEGV received. &lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="276920">SERVER-23481</key>
            <summary>How to enable mongod coredump?</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</type>
                                            <priority id="5" iconUrl="https://jira.mongodb.org/images/icons/priorities/trivial.svg">Trivial - P5</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="zyd_com@126.com">Zhang Youdong</reporter>
                        <labels>
                    </labels>
                <created>Sat, 2 Apr 2016 06:57:43 +0000</created>
                <updated>Mon, 15 Nov 2021 15:13:18 +0000</updated>
                            <resolved>Thu, 7 Apr 2016 16:53:02 +0000</resolved>
                                                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1228939" author="bruce.lucas@10gen.com" created="Thu, 7 Apr 2016 11:39:31 +0000"  >&lt;p&gt;Glad to hear that you tracked the issue down. You are probably already aware of this, but the location of core files can be controlled by    /proc/sys/kernel/core_pattern.&lt;/p&gt;</comment>
                            <comment id="1228672" author="zyd_com@126.com" created="Thu, 7 Apr 2016 07:06:44 +0000"  >&lt;p&gt;Thanks a lot, I have got the reason.&lt;/p&gt;

&lt;p&gt;after mongod started with fork option set to true,  it chdir(&quot;/&quot;) to root dir. mongod started by normal user have no permission to write &quot;/&quot;, so no core files are dumped.&lt;/p&gt;</comment>
                            <comment id="1227878" author="bruce.lucas@10gen.com" created="Wed, 6 Apr 2016 17:17:20 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=zyd_com&quot; class=&quot;user-hover&quot; rel=&quot;zyd_com&quot;&gt;zyd_com&lt;/a&gt;, have you checked system logs to see if abrtd (or similar) has done something with the core file, e.g. move it to /var/spool/abrt, or delete it? Depending on how it&apos;s configured, it may behave differently for installed and uninstalled programs. (Preceding applies to EL, but I believe there may be something similar in Ubuntu.)&lt;/p&gt;</comment>
                            <comment id="1227216" author="zyd_com@126.com" created="Wed, 6 Apr 2016 08:32:27 +0000"  >&lt;p&gt;hi, Andy Schwerin, Can you help me figure out this problem, it&apos;s really important to me. &lt;/p&gt;</comment>
                            <comment id="1223483" author="zyd_com@126.com" created="Sun, 3 Apr 2016 05:11:43 +0000"  >&lt;p&gt;Thank you for your reply, I am using MongoDB-3.2.3.&lt;/p&gt;

&lt;p&gt;Why &quot;it&apos;s unnecessary for version 3.2.0 and above&quot; ?  and what should I do to enable core dump when received SIGSEGV in 3.2.0?  &lt;/p&gt;
</comment>
                            <comment id="1223407" author="schwerin" created="Sat, 2 Apr 2016 15:47:46 +0000"  >&lt;p&gt;What version of MongoDB? Your patch should be unnecessary for version 3.2.0 and above, and should have been sufficient for prior versions.&lt;/p&gt;</comment>
                    </comments>
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