"Web server automatically restarted"

[MikeDVB]

I got this email:
"At [23/Feb/2010:00:02:39 -0500], web server with pid=3028 received unexpected signal=9, no core file is created. A new instance of web server will be started automatically!"

It happens from time to time on cPanel servers such as when somebody is adding/removing add-on domains etc...

Well this time it didn't restart - I logged into the server and issued a restart and LSWS wasn't running (and as such it only fired up a new instance of LSWS).

This was on 4.0.12 - I just now (after this incident) upgraded to 4.0.13 - is this something that was perhaps addressed? The change log is vague at best.

 

[nolnet]

This has been happening to me as well twice today in fact. I had to login and manually start LSWS.

 

[mistwang]

If it still happen with 4.0.13, I may need to login to the server and take a look what exactly happened.
Maybe cPanel killed all lshttpd process with signal 9(sigkill).

 

[MikeDVB]

It only happened once, and then we decided to go ahead and upgrade to 4.0.13 but we do get the occasional message that Signal 9 was received (but it always restarts).

At [23/Feb/2010:00:02:39 -0500], web server with pid=3028 received unexpected signal=9, no core file is created. A new instance of web server will be started automatically!

 

[Tony]

It's being triggered by safeapacherestart from cPanel I believe.

/usr/local/cpanel/logs/safeapacherestart_log


You get this:

[2010-02-23 23:57:58 -0600] info [safeapacherestart] Restart elapsed seconds: 1
[2010-02-24 00:03:04 -0600] info [safeapacherestart] Restart elapsed seconds: 0
[2010-02-24 15:05:14 -0600] info [safeapacherestart] Restart elapsed seconds: 1
[2010-02-24 15:14:00 -0600] info [safeapacherestart] Restart elapsed seconds: 1
[2010-02-24 15:40:18 -0600] info [safeapacherestart] Forced restart elapsed seconds: 5
[2010-02-24 15:43:27 -0600] info [safeapacherestart] Restart elapsed seconds: 2

Possibly this maybe:

Forced restart elapsed seconds: 5

They're forcing it by kill -9 ?


Seems to only happen when dealing with sub domains, add-on domains and parked domains. Creation of accounts no signal 9.

 

[mistwang]

Do you know where is the safeapacherestart script located, we need to check the script and find a way to avoid "Forced restart".

 

[ffeingol]

/usr/local/cpanel/bin/safeapacherestart It's not a script, it's a compiled program.

 

[Tony]

It might not be the safeapacherestart script triggering it it's tough to say. I see graceful restarts issued so it looks like its doing originally what it's suppose to do. I don't know would it be looking for specific output from Apache to confirm it was a graceful restart? Lsws is not sending that in the output so it's assume it's not restarting and is issueing a kill instead?

 

[mistwang]

[2010-02-24 15:40:18 -0600] info [safeapacherestart] Forced restart elapsed seconds: 5

Please check /usr/local/lsws/logs/ap_cmd_param.log for log entries around that time.
I need to know what command issued by WHM to restart httpd by that time.

 

[mistwang]

Please download and upgrade to the latest build of 4.0.13, this issue should have been addressed.

 

[Tony]

Still seeing the signal 15's here I guess our servers are to high traffic for their own good.