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Apache服务器不断崩溃,“发现SIGTERM,正在关闭”

壤驷阳冰
2023-03-14
问题内容

这只是在大约三周前开始发生。我网站的内容没有改变,只是一个使用MySQL作为后端的phpBB论坛。

一年来没有任何变化,但是最近每隔两天左右,服务器就会关闭并且根本无法访问,我必须通知我的服务提供商以物理方式重新启动计算机

它似乎与我在日志中发现的SIGTERM错误有关。问题是我不知道该如何解决这些问题或找到根本原因,因为我在这方面的技能不足。

任何人都有任何想法怎么回事?

Apache / 2.2.3(CentOS)

20051115

Linux 2.6.18-028stab057.4#1 SMP Fri Aug 1 10:47:59 MSD 2008 x86_64

从错误日志中:[Sun Nov 01 15:18:53 2009] [notice]捕获了SIGTERM,并关闭了

不能完全确定这是导致我出现问题的原因,但听起来并不好。

如果需要,我可以发布更多日志信息

[Sun Nov 01 05:07:17 2009] [notice] Digest: generating secret for digest authentication ...
[Sun Nov 01 05:07:17 2009] [notice] Digest: done
[Sun Nov 01 05:07:19 2009] [notice] mod_python: Creating 4 session mutexes based on 10 max processes and 0 max threads.
[Sun Nov 01 05:07:19 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 05:07:19 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 05:07:19 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 05:07:19 2009] [warn] Init: SSL server IP/port conflict: default-64-6-237-192:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:83) vs. webmail:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:159)
[Sun Nov 01 05:07:19 2009] [warn] Init: You should not use name-based virtual hosts in conjunction with SSL!!
[Sun Nov 01 05:07:19 2009] [warn] WARNING: Attempt to change ServerLimit ignored during restart
[Sun Nov 01 05:07:19 2009] [notice] Apache/2.2.3 (CentOS) configured -- resuming normal operations
[Sun Nov 01 15:16:11 2009] [error] [client 127.0.0.1] Invalid method in request get
[Sun Nov 01 15:18:53 2009] [notice] caught SIGTERM, shutting down
[Sun Nov 01 15:19:27 2009] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Sun Nov 01 15:19:27 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 15:19:27 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 15:19:27 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 15:19:27 2009] [warn] Init: SSL server IP/port conflict: default-64-6-237-192:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:83) vs. webmail:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:159)
[Sun Nov 01 15:19:27 2009] [warn] Init: You should not use name-based virtual hosts in conjunction with SSL!!
[Sun Nov 01 15:19:27 2009] [notice] Digest: generating secret for digest authentication ...
[Sun Nov 01 15:19:27 2009] [notice] Digest: done
[Sun Nov 01 15:19:27 2009] [notice] mod_python: Creating 4 session mutexes based on 10 max processes and 0 max threads.
[Sun Nov 01 15:19:27 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 15:19:27 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 15:19:27 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Sun Nov 01 15:19:27 2009] [warn] Init: SSL server IP/port conflict: default-64-6-237-192:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:83) vs. webmail:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:159)
[Sun Nov 01 15:19:27 2009] [warn] Init: You should not use name-based virtual hosts in conjunction with SSL!!
[Sun Nov 01 15:19:27 2009] [notice] Apache/2.2.3 (CentOS) configured -- resuming normal operations
[Sun Nov 01 16:42:31 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 16:47:25 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 16:59:22 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 17:37:42 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 17:44:54 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 17:44:55 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 17:44:56 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 18:14:45 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 18:40:30 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 20:10:59 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 20:35:10 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 20:43:07 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 20:43:46 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 21:25:39 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 21:26:03 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 21:56:57 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:21:02 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:25:16 2009] [error] server reached MaxClients setting, consider raising the MaxClients setting
[Sun Nov 01 22:25:17 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:25:18 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:25:20 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:25:21 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:25:22 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:46:47 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:52:56 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:56:07 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:56:51 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 22:56:58 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 23:00:41 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 23:09:59 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 23:23:49 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 23:27:14 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 23:36:25 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Sun Nov 01 23:54:06 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 00:12:44 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 00:12:50 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 00:13:23 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 00:39:06 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 00:52:50 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 00:53:02 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:13:38 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:13:39 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:13:40 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:23:01 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:43:47 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:45:51 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:46:27 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 01:47:25 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 02:23:02 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 02:25:37 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 02:25:38 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 02:52:29 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 02:52:51 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 03:49:29 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 03:49:48 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 04:35:33 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 04:46:01 2009] [error] [client 66.96.201.63] File does not exist: /var/www/vhosts/default/htdocs/README
[Mon Nov 02 04:46:01 2009] [error] [client 66.96.201.63] File does not exist: /var/www/vhosts/default/htdocs/horde
[Mon Nov 02 04:46:01 2009] [error] [client 66.96.201.63] File does not exist: /var/www/vhosts/default/htdocs/horde2
[Mon Nov 02 04:46:01 2009] [error] [client 66.96.201.63] File does not exist: /var/www/vhosts/default/htdocs/horde3
[Mon Nov 02 04:46:01 2009] [error] [client 66.96.201.63] File does not exist: /var/www/vhosts/default/htdocs/horde-3.0.9
[Mon Nov 02 04:46:01 2009] [error] [client 66.96.201.63] File does not exist: /var/www/vhosts/default/htdocs/Horde
[Mon Nov 02 04:46:02 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 05:01:06 2009] [error] [client 58.246.73.74] File does not exist: /var/www/vhosts/default/htdocs/README
[Mon Nov 02 05:01:06 2009] [error] [client 58.246.73.74] File does not exist: /var/www/vhosts/default/htdocs/horde
[Mon Nov 02 05:01:07 2009] [error] [client 58.246.73.74] File does not exist: /var/www/vhosts/default/htdocs/horde2
[Mon Nov 02 05:01:08 2009] [error] [client 58.246.73.74] File does not exist: /var/www/vhosts/default/htdocs/horde3
[Mon Nov 02 05:01:08 2009] [error] [client 58.246.73.74] File does not exist: /var/www/vhosts/default/htdocs/horde-3.0.9
[Mon Nov 02 05:01:09 2009] [error] [client 58.246.73.74] File does not exist: /var/www/vhosts/default/htdocs/Horde
[Mon Nov 02 05:01:09 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 05:01:10 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 05:01:11 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
[Mon Nov 02 09:17:58 2009] [notice] caught SIGTERM, shutting down
[Mon Nov 02 09:18:58 2009] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Mon Nov 02 09:18:58 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Mon Nov 02 09:18:58 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Mon Nov 02 09:18:58 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Mon Nov 02 09:18:58 2009] [warn] Init: SSL server IP/port conflict: default-64-6-237-192:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:83) vs. webmail:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:159)
[Mon Nov 02 09:18:58 2009] [warn] Init: You should not use name-based virtual hosts in conjunction with SSL!!
[Mon Nov 02 09:18:58 2009] [notice] Digest: generating secret for digest authentication ...
[Mon Nov 02 09:18:58 2009] [notice] Digest: done
[Mon Nov 02 09:18:58 2009] [notice] mod_python: Creating 4 session mutexes based on 10 max processes and 0 max threads.
[Mon Nov 02 09:18:58 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Mon Nov 02 09:18:58 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Mon Nov 02 09:18:58 2009] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
[Mon Nov 02 09:18:58 2009] [warn] Init: SSL server IP/port conflict: default-64-6-237-192:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:83) vs. webmail:443 (/etc/httpd/conf.d/zz010_psa_httpd.conf:159)
[Mon Nov 02 09:18:58 2009] [warn] Init: You should not use name-based virtual hosts in conjunction with SSL!!
[Mon Nov 02 09:18:58 2009] [notice] Apache/2.2.3 (CentOS) configured -- resuming normal operations
[Mon Nov 02 09:32:34 2009] [error] [client ::1] Directory index forbidden by Options directive: /var/www/html/
linux apache crash sigterm
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edited Jun 4 '10 at 14:54

Martijn Courteaux
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asked Nov 2 '09 at 15:02

Tom
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2
Shouldn't this go to serverfault.com? – mhaller Nov 2 '09 at 15:34
I didn't even know that existed, I'll repost it over there, thanks. – Tom Nov 2 '09 at 15:51
4
Tom, sorry to revive a long-dead thread, but was this problem resolved in the end? I seem to be experiencing exactly the same problem on Apache/2.2.3 (CentOS). CPU/memory utilized maxes out, and then a hard reset is required. – Wayne Sep 14 '11 at 1:47
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7 Answers
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17

SIGTERM is used to restart Apache (provided that it's setup in init to auto-restart): http://httpd.apache.org/docs/2.2/stopping.html

The entries you see in the logs are almost certainly there because your provider used SIGTERM for that purpose. If it's truly crashing, not even serving static content, then that sounds like some sort of a thread/connection exhaustion issue. Perhaps a DoS that holds connections open?

Should definitely be something for your provider to investigate.

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answered Nov 2 '09 at 15:18

kdgregory
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That's the thing, my provider is telling me it's out of their hands due to the nature of my hosting solution. I keep telling them nothing has changed on my end since this has started happening but it's falling on deaf ears, they just tell me to look at the logs and hire someone to help which is not what I want to hear. I'll add some log info to my OP. – Tom Nov 2 '09 at 15:28
Things from the logs that I found interesting: "server reached MaxClients setting" at 22:25:16, and all the access forbidden messages. Take a look at your access log and see what's happening during that time. – kdgregory Nov 2 '09 at 15:50
Also: note that the SIGTERM happened at 09:17:58, while the previous message in the queue was at 05:01:11 -- this again indicates that the SIGTERM was intentional. I'd again look at the access log to see the previous activty -- I'm guessing it will stop somewhere around 05:01. – kdgregory Nov 2 '09 at 15:51
Finally: I'm not an Apache expert by any means, but all those error messages on restart would worry me. It seems like your provider isn't an Apache expert either. – kdgregory Nov 2 '09 at 15:52
Oh so the SIGTERM is most likely the provider shutting down the server then? I neglected to look at the times and you're right. The crash looks like it's happening here at 5:01 and then when I figure out what's happening, I notify my provider who restarts the server at 9:17. – Tom Nov 2 '09 at 15:58
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0

Try to upgrade and install new packages

sudo apt-get update && sudo apt-get upgrade -y
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answered 2 hours ago

Bob Pikaar
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0

try to disable the rewrite module in ubuntu using sudo a2dismod rewrite. This will perhaps stop your apache server to crash.

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answered Apr 24 at 11:10

Vishvesh Ujawane
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0

Apache is not running
It could also be something as simple as Apache not being configured to start automatically on boot. Assuming you are on a Red Hat-like system such as CentOS or Fedora, the chkconfig –list command will show you which services are set to start for each runlevel. You should see a line like

    httpd           0:off   1:off   2:on    3:on    4:on    5:on    6:off
If instead it says "off" all the way across, you can activate it with chkconfig httpd on. OR you can start apache manually from your panel.

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answered Feb 17 at 13:13

Muzaffar
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from this page:

I found this info:

The mod_fastcgi process manager isn't particularly patient though (there's room for improvement here) and since it has to shutdown too, sends a SIGTERM to all of the FastCGI applications it is responsible for. Apache will restart the process manager and it will restart its managed applications (as if the server was just started). SIGTERM is, well, SIGTERM - your application should exit quickly.

What this implies to me is that if Database I/O, or some other part of the CGI script, fails to respond in a timely fashion (ie getting slower with data-volume growth), that mod_fastcgi is killing the script......is that how other people interpret these docs or what am I missing..

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answered Sep 7 '13 at 18:33

Dewey
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I had mysterious SIGTERM shutdowns in our L.A.M.P. server, and it turned out to be an error in a custom PHP module, which was caused by mismatched versions. It was found by looking in the apache access/error logs at the time of malfunction. Don't forget to turn error logging on.

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answered Nov 2 '09 at 19:06

dar7yl
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Are these the error logs located in /var/logs/httpd? Do you remember the jist of the error message in the log? – Tom Nov 2 '09 at 19:54
it would be in var/log/apache2/ in newer versions (by default) – toing_toing May 26 at 9:57 
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3

Have you asked your provider to investigate? I assume this is not a dedicated server,

On the face of it, this seems like a security exception and somone is trying to exploit it / or there is a process running at a set time which is causing this, can you think of anything that runs on the server every 2 days? Logging tools?

SIGTERM is the signal sent to a process to request its termination. The symbolic constant for SIGTERM is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms, however on the vast majority of systems, SIGTERM is signal #15.

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answered Nov 2 '09 at 15:09

LiamB
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The server is a VPS and my provider told me they don't offer support for this type of thing. It's all pretty much under my control. Would it help figuring out what his happening if I posted more of the error log? – Tom Nov 2 '09 at 15:12
It may do, but so far the error log is telling us that somthing with admin privalges told the server to shutdown. – LiamB Nov 2 '09 at 15:14
Apache restarts itself periodically, with a signature like that, to clean stuff out, I guess. Problem may be that it's not coming- back- from that automatic restart. – Kzqai Jul 2 '11 at 23:41
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问题答案:

SIGTERM用于重新启动Apache(前提是它已在init中设置为自动重新启动):http
:
//httpd.apache.org/docs/2.2/stopping.html

您几乎肯定会在日志中看到这些条目,因为您的提供商为此目的使用了SIGTERM。如果确实崩溃了,甚至没有提供静态内容,那听起来就像是某种线程/连接耗尽问题。也许保持连接开放的DoS?

绝对应该让您的提供商进行调查。



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  • 更新:同样的问题似乎也发生在Intellij中。我的eclipse安装一直在毫无警告地崩溃。窗口将在随机点突然关闭。 有时会生成错误日志。下面是一个示例(消息各不相同) 我在eclipse安装过程中遇到了一些崩溃问题。我重新安装了java(8)和eclipse,甚至重新安装了windows(这只是改变了错误消息) 还有一个: 系统信息包含 还有第三个 工作区日志包含重复的: eclipse.ini

  • 每次启动Farming Valley服务器时,都会出现以下错误: 我基本上没有这方面的经验,我不明白这是怎么回事。如有任何帮助,我们将不胜感激!提前道谢。知道我从OVH那里买了一台服务器可能会很好