error 503, service not available

[ZieglerM]

hi all,

almost every morning when logging into plesk panel i get the error message "error 503, service not available". after doing a "service psa restart" everything works again as it should.

anyone else who is getting this error?

thanks, martin

 

[abdi]

That means your plesk crashes such oftenly.

Do you have anything in plesk logs that can give us a clue to what happens or leads it to crash?

 

[ZieglerM]

the only thing i can find is in /var/log/sw-cp-server/error_log:


DEBUGGER DETECTED... Bye!
2012-06-24 22:08:35: (mod_fastcgi.c.2613) unexpected end-of-file (perhaps the fastcgi process died): pid: 13042 socket: unix:/opt/psa/tmp/sw-engine.sock-0
2012-06-24 22:08:35: (mod_fastcgi.c.3357) child signaled: 9
2012-06-24 22:08:35: (mod_fastcgi.c.3400) response not received, request sent: 661 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /login_up.php3?login_name=admin&passwd=0362092, closing connection
2012-06-25 07:47:29: (server.c.1543) server stopped by UID = 0 PID = 3593
2012-06-25 07:47:29: (log.c.166) server started
2012-06-25 07:47:56: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe
2012-06-25 07:59:39: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe
2012-06-25 08:13:03: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe
2012-06-25 08:58:00: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe
2012-06-25 09:55:21: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe


are there any other interesting logfiles beside of /opt/psa/admin/logs and /opt/psa/var/log?

 

[abdi]

Just out of curiosity, what are your server specs?
Ie, RAM, CPU & SWAP ...

From that error looks like mod_fastcgi too so long to respond to plesk which can be some times as a result of the server running out or memory (RAM) or SWAP.

 

[ZieglerM]

root@mail3:/var/log# free
total used free shared buffers cached
Mem: 8145804 7830152 315652 0 248840 5614096
-/+ buffers/cache: 1967216 6178588
Swap: 7999480 104664 7894816
root@mail3:/var/log#



root@mail3:/var/log# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 16
model : 4
model name : Quad-Core AMD Opteron(tm) Processor 1389
stepping : 2
microcode : 0x1000086
cpu MHz : 800.000
cache size : 512 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save
bogomips : 5800.24
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate
[...]


root@mail3:/var/log# uname -a
Linux mail3.<domain> 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
root@mail3:/var/log#



root@mail3:/var/log# cat /etc/issue
Ubuntu 12.04 LTS \n \l

root@mail3:/var/log#



do you need anything else? it is the latest revision of a standard server of one of the largest hosting providers here in Germany.

 

[paulieG]

Hi,

Just to clarify, do you login then get the error, or does the error occur when you navigate to the Plesk panel? (The former I think used to be caused by lack of memory for the panel APC instance but that seems somewhat unlikely in your case since we used to see it on 256MB VPSs not 8GB dedicated servers).

Is it the same rough time each day (22:08) that you have those errors in the log (and I assume that isn't your password)?

I'm only running Plesk 11 on various Centos 5 and 6 VPSs, but I'm not having a problem with the Control Panel crashing.

Paul.

 

[ZieglerM]

i get the error when accessing plesk panel via web.

error_log:2012-06-24 07:27:44: (mod_fastcgi.c.3357) child signaled: 9
error_log:2012-06-24 22:08:35: (mod_fastcgi.c.3357) child signaled: 9
error_log.1:2012-06-17 13:18:49: (mod_fastcgi.c.3357) child signaled: 9
error_log.1:2012-06-17 22:29:50: (mod_fastcgi.c.3357) child signaled: 9
error_log.1:2012-06-20 19:54:46: (mod_fastcgi.c.3357) child signaled: 9
error_log.1:2012-06-21 03:24:27: (mod_fastcgi.c.3357) child signaled: 9
error_log.1:2012-06-23 03:06:06: (mod_fastcgi.c.3357) child signaled: 9
error_log.1:2012-06-23 03:10:22: (mod_fastcgi.c.3357) child signaled: 9

btw: i think i just found the reason why i'm not able to view logs via plesk panel although it looks like php was compiled with zlib:

error_log.1:2012-06-20 10:33:05: (mod_fastcgi.c.2746) FastCGI-stderr: PHP Fatal error: Call to undefined function gzopen() in /opt/psa/admin/
htdocs/domains/logs/log_file_viewer.php on line 59
error_log.1:2012-06-20 10:33:11: (mod_fastcgi.c.2746) FastCGI-stderr: PHP Fatal error: Call to undefined function gzopen() in /opt/psa/admin/
htdocs/domains/logs/log_file_viewer.php on line 59
error_log.1:2012-06-20 10:33:16: (mod_fastcgi.c.2746) FastCGI-stderr: PHP Fatal error: Call to undefined function gzopen() in /opt/psa/admin/
htdocs/domains/logs/log_file_viewer.php on line 59
error_log.1:2012-06-20 10:33:22: (mod_fastcgi.c.2746) FastCGI-stderr: PHP Fatal error: Call to undefined function gzopen() in /opt/psa/admin/
htdocs/domains/logs/log_file_viewer.php on line 59
error_log.1:2012-06-20 10:34:13: (mod_fastcgi.c.2746) FastCGI-stderr: PHP Fatal error: Call to undefined function gzopen() in /opt/psa/admin/
htdocs/domains/logs/log_file_viewer.php on line 59
error_log.1:2012-06-20 10:34:16: (mod_fastcgi.c.2746) FastCGI-stderr: PHP Fatal error: Call to undefined function gzopen() in /opt/psa/admin/htdocs/domains/logs/log_file_viewer.php on line 59

 

[paulieG]

Looks like this is not necessarily a new issue, anything in this thread help : http://forum.parallels.com/pda/index.php/t-112880.html

 

[abdi]

How many of these var values do you have?

StartServers
MinSpareServers
MaxSpareServers
MaxClients
MaxRequestsPerChild

If you are still using default, then chance are they are low and you need to increase them ...
A good tutorial about them is on the links below:

http://emergent.urbanpug.com/?p=60
http://www.crucialp.com/resources/t...ze-tweak-high-traffic-servers-apache-load.php

 

[ZieglerM]

How many of these var values do you have?

StartServers
MinSpareServers
MaxSpareServers
MaxClients
MaxRequestsPerChild

If you are still using default, then chance are they are low and you need to increase them ...
A good tutorial about them is on the links below:

http://emergent.urbanpug.com/?p=60
http://www.crucialp.com/resources/t...ze-tweak-high-traffic-servers-apache-load.php

i don't think that this is the cause of the problem, because until now i only added a few "small" customers to the server and the server load is quite low. anyhow, to give it a try i increased the values. let's see what happens.

 

[ZieglerM]

again got the error this morning:

"503 - Service Not Available"

# cat /var/log/error_log
2012-07-01 20:43:48: (mod_fastcgi.c.2613) unexpected end-of-file (perhaps the fastcgi process died): pid: 4333 socket: unix:/opt/psa/tmp/sw-engine-8880.sock-0
2012-07-01 20:43:48: (mod_fastcgi.c.3357) child signaled: 9
2012-07-01 20:43:48: (mod_fastcgi.c.3400) response not received, request sent: 654 on socket: unix:/opt/psa/tmp/sw-engine-8880.sock-0 for /login_up.php3?login_name=admin&passwd=07081990, closing connection
2012-07-01 23:19:11: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe
DEBUGGER DETECTED... Bye!
2012-07-04 01:25:02: (mod_fastcgi.c.2613) unexpected end-of-file (perhaps the fastcgi process died): pid: 28404 socket: unix:/opt/psa/tmp/sw-engine.sock-0
2012-07-04 01:25:02: (mod_fastcgi.c.3357) child signaled: 9
2012-07-04 01:25:02: (mod_fastcgi.c.3400) response not received, request sent: 659 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /login_up.php3?login_name=admin&passwd=alois, closing connection

 

[ZieglerM]

today it happened again.

any ideas please?

 

[abdi]

I can't say what is wrong there. Detailed investigation directly on your server is required. Therefore I suggest you contact Support Team. Experienced support guys will find a reason...

However, you can also try this:

Usually If hosting more than 300 Web sites on the server, Apache may fail to work because of problem with file descriptors limit. Apache by default can handle only 1024 file descriptors. Every Virtual Host requires 2 or 4 (if HTTPS is enabled) log files, so with this scheme only about 300 domains can be hosted without Apache recompilation.

Piped Logs feature that was implemented in Plesk allows to host safely on the default Apache web server build up to 900 domains. If you have more that 900 domains, you still have to recompile Apache and some other system packages as described in article (http://kb.parallels.com/en/260). To enable Piped Logs the following steps have to be done:

As a root user:

 mysql -uadmin -p`cat /etc/psa/.psa.shadow` psa -e "replace into misc (param,val) values ('apache_pipelog', 'true');"

and

/usr/local/psa/admin/sbin/httpdmng --reconfigure-all

 

[abdi]

Also, you can try to increasing the $ulimit value.

First you need to verify if ulimit is set. Try executing the command:

echo $ulimit

If it is blank or a low value, try executing the command:

ulimit -n 131072

In order to make this change permanent

vim /etc/sysctl.conf

and add following lines

fs.file-max = 131072
/sbin/sysctl -w fs.file-max=131072

Then

mysql -uadmin -p`cat /etc/psa/.psa.shadow` psa -e "replace into misc (param,val) values ('apache_pipelog', 'true');"

then,

/usr/local/psa/admin/sbin/httpdmng --reconfigure-all
/etc/init.d/httpd restart

 

[WernerD]

same error #503 sw-cp-server

I'm usung PLESK 11 on UBUNTU 12.04 LTS and get error in /var/log/sw-cp-server/error_log:

DEBUGGER DETECTED... Bye!
2012-08-21 20:51:25: (mod_fastcgi.c.2613) unexpected end-of-file (perhaps the fastcgi process died): pid: 24305 socket: unix:/opt/psa/tmp/sw-engine.sock-0.
2012-08-21 20:51:25: (mod_fastcgi.c.3357) child signaled: 9.
2012-08-21 20:51:25: (mod_fastcgi.c.3400) response not received, request sent: 656 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /login_up.php3?login_name=admin&passwd=carlo, closing connection.
2012-08-21 20:51:38: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe.
2012-08-21 20:56:40: (server.c.1543) server stopped by UID = 0 PID = 24418.

I get error #503, after restarting sw-cp.server it works again for about 12 to 24 hours

Any Idea / solution ?

 

[IgorG]

Looks like upgrade was not successfully completed. Try bootstrapper repair.

 

[WernerD]

bootstrapper repair was succesfully .... but same errors after about 10 hours ...

2012-08-23 04:55:14: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe.
DEBUGGER DETECTED... Bye!
2012-08-23 05:00:17: (mod_fastcgi.c.2613) unexpected end-of-file (perhaps the fastcgi process died): pid: 15059 socket: unix:/opt/psa/tmp/sw-engine.sock-0.
2012-08-23 05:00:17: (mod_fastcgi.c.3357) child signaled: 9.
2012-08-23 05:00:17: (mod_fastcgi.c.3400) response not received, request sent: 497 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /index.php?, closing connection.
2012-08-23 05:00:17: (server.c.1543) server stopped by UID = 0 PID = 15123.
2012-08-23 05:00:18: (log.c.166) server started.
2012-08-23 05:05:20: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe

 

[Knarf]

Today I had the same error message "error 503, service not available" at the Plesk login page.
The server is a freshly installed server (7 days ago) with Ubuntu 12.04 and Plesk 11.0.9 update #19.

This is in the /var/log/sw-cp-server/error_log:

2012-11-02 04:30:09: (connections.c.1762) SSL (error): 5 -1 32 Broken pipe
DEBUGGER DETECTED... Bye!
2012-11-02 04:51:54: (mod_fastcgi.c.2613) unexpected end-of-file (perhaps the fastcgi process died): pid: 3836 socket: unix:/opt/psa/tmp/sw-engine.sock-0
2012-11-02 04:51:54: (mod_fastcgi.c.3357) child signaled: 9
2012-11-02 04:51:54: (mod_fastcgi.c.3400) response not received, request sent: 656 on socket: unix:/opt/psa/tmp/sw-engine.sock-0 for /login_up.php3?login_name=admin&passwd=meier, closing connection
2012-11-02 09:25:39: (log.c.166) server started
2012-11-02 09:25:39: (network.c.371) can't bind to port: 127.0.0.1 10001 Address already in use

I also wonder what the line is with login_name=admin&passwd=meier because it is not mine, is someone trying to hack the server?

I restarted the whole server to get Plesk working again because the psa service restart didn't work.

 

[LegionFX]

same problem here, fresh server installed, error 503 only in panel not domains once a day and REALLY high cpu load! Jesus really high, 260 - 500 % the only solution is restart and it can hold for a few hours. 1 domain only installed(im a test junkie), 8 g ram, quad core. this is only after the last update.

the same thing happens in another server it diferent specs and configuration. Meaning its plesk problem in the last update.

 

[Thomas Papamichail]

Don't forget to check your hdd. Maybe the disk is full
# df -h