[LSWS 4.2.1] restarts automatically to fix 503 Errors

[Alfa-Host]

Hello,

After upgrade to 4.2.1 and rebuild php with lsapi 6.1 , within 12 hours i got 35 "restarts automatically to fix 503 Errors" mail.

This is normal ?

Thanks.

 

[webizen]

pls switch back to the old lsphp5 (stay with 4.2.1) and see any difference.

 

[mistwang]

Please email to bug@litespeed... or PM us a temp root access, we will take a look.

 

[Alfa-Host]

Today I encountered a downtime in my server ,the reason was not clear. after that i disabled the PHP suEXEC daemon mode and did not get any 503 fix mail ,
3 hours later I encountered the sites is not loading problem , after checking server from cpanel I saw my server load is too high (near 200 and every second goes up) , login to ssh was not possible also i can't kill any process from cpanel process manager , i performed a hardware reboot and after that i set LVE to off and switch back to 4.1.13 , now after 7h i did not see any problem .

OS : CloudLinux 2.6.32-379.11.1.lve1.1.9.8.2.el6.x86_64

 

[mistwang]

Please send error.log and stderr.log during the 503 problem to us, or let our staff to collect those log files from your server.

 

[Alfa-Host]

A few days ago I sent the logs to you , the files can show the problem?

 

[mistwang]

It looks like CloudLinux resource limit was hit, and causes 503 errors in your case.
You should be careful with "PHP suEXEC max conn", if set it too high, while CageFS/LVE limit was not high enough, it will cause trouble during traffic surge.

 

[Alfa-Host]

I must set "PHP suEXEC max conn" same as "EP" in cloudlinux ?
http://docs.cloudlinux.com/limits.html

 

[webizen]

I must set "PHP suEXEC max conn" same as "EP" in cloudlinux ?
http://docs.cloudlinux.com/limits.html

No, it should be lower than EP.

 

[Alfa-Host]

I used LSWS 4.2.1 again but server crashed again :

Message from syslogd@sv6 at Dec 5 10:42:24 ...
kernel:[425682.950437] BUG: soft lockup - CPU#0 stuck for 67s! [lsphp5:279355]

Message from syslogd@sv6 at Dec 5 10:42:24 ...
kernel:[425682.956419] BUG: soft lockup - CPU#2 stuck for 67s! [lsphp5:279193]

Message from syslogd@sv6 at Dec 5 10:42:36 ...
kernel:[425694.925191] BUG: soft lockup - CPU#3 stuck for 67s! [lsphp5:279455]

Message from syslogd@sv6 at Dec 5 10:42:36 ...
kernel:[425694.928182] BUG: soft lockup - CPU#4 stuck for 67s! [lsphp5:279326]

Message from syslogd@sv6 at Dec 5 10:42:36 ...
kernel:[425694.935162] BUG: soft lockup - CPU#6 stuck for 67s! [lsphp5:279038]

Server load avg goes to high and every second goes up and then server hung !

 

[NiteWave]

googled the error message, this is the best result I've got:
http://linuxtoolkit.blogspot.sg/2012/06/bug-soft-lockup-cpu3-stuck-for-10s-on.html
see if it will resolve your issue or have sny improvement.