---
slug: "ubuntu1804-apacheが強制終了する"
title: "When Apache on Ubuntu 18.04 is Forcefully Terminated"
description: "Apache suddenly crashes, and upon checking the logs, I found the following messages: \"AH00050: Child 7815 returned a Fatal error... Apache is exiting!\" and \"AH02818: MPM run failed, exiting.\""
url: "https://www.ytyng.com/en/blog/ubuntu1804-apacheが強制終了する"
publish_date: "2018-09-03T11:11:58Z"
created: "2018-09-03T11:11:58Z"
updated: "2026-02-27T10:45:00.928Z"
categories: []
keywords: ""
featured_image_url: "https://media.ytyng.com/resize/20230812/96e8cb98f4e34183b109208f8e1f72e1.png.webp?width=768"
has_video: false
has_music: false
video_urls: []
music_urls: []
lang: "en"
---

# When Apache on Ubuntu 18.04 is Forcefully Terminated

<p>Since Apache suddenly dies, I checked the logs and found:</p>
<pre>$ tail /var/log/apache2/error.log</pre>
<pre>[Mon Sep 03 19:24:17.252747 2018] [mpm_prefork:emerg] [pid 7851] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.253264 2018] [mpm_prefork:emerg] [pid 7819] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.253385 2018] [mpm_prefork:emerg] [pid 7815] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.253561 2018] [mpm_prefork:emerg] [pid 7817] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.253739 2018] [mpm_prefork:emerg] [pid 7852] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.253916 2018] [mpm_prefork:emerg] [pid 7855] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.252992 2018] [mpm_prefork:emerg] [pid 7848] (43)Identifier removed: AH00144: couldn't grab the accept mutex<br />[Mon Sep 03 19:24:17.464946 2018] [core:alert] [pid 7636] AH00050: Child 7815 returned a Fatal error... Apache is exiting!<br />[Mon Sep 03 19:24:17.464976 2018] [:emerg] [pid 7636] AH02818: MPM run failed, exitin</pre>
<p>It looked like this.</p>
<p>Referencing "AH00144: couldn't grab the accept mutex in Apache 2.4 | gwaw.jp"<br /><a href="https://www.gwaw.jp/20180526-16.html">https://www.gwaw.jp/20180526-16.html</a></p>
<p>I did the following:</p>
<pre>$ sudo bash -c "echo 'Mutex file:\${APACHE_LOCK_DIR} default' &gt; /etc/apache2/conf-available/mutex-file.conf"</pre>
<p>Then:</p>
<pre>$ sudo a2enconf mutex-file<br />$ sudo systemctl restart apache2</pre>
<p>And it worked.</p>