503 Service Unavailable The server is temporarily busy, try again later

[3245]

hello

when i run 2tab or more together (some process), then i see below error:

503 Service Unavailable
The server is temporarily busy, try again later! Powered By LiteSpeed Web Server
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when i run f5, that will continue same process,

why i see this issue?

root@host [/opt]# /opt/lsws/fcgi-bin/lsphp5 -i > ttt
root@host [/opt]#

root@host [/opt]# php -v
PHP 5.3.27 (cli) (built: Oct 25 2013 23:35:52)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
with the ionCube PHP Loader v4.4.1, Copyright (c) 2002-2013, by ionCube Ltd.

root@host [/opt]# php -i > ttt
root@host [/opt]#

root@host [/opt/lsws/fcgi-bin]# uname -a
Linux host.name.com 2.6.32-458.18.1.lve1.2.39.el6.x86_64 #1 SMP Mon Sep 16 12:10:28 EEST 2013 x86_64 x86_64 x86_64 GNU/Linux

below is list our module:

[PHP Modules]
bcmath
calendar
Core
ctype
curl
date
dom
ereg
filter
ftp
gd
gettext
hash
iconv
imap
ionCube Loader
json
libxml
mbstring
mcrypt
mysql
openssl
pcre
Phar
posix
Reflection
session
SimpleXML
soap
sockets
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlrpc
xmlwriter
zip
zlib

[Zend Modules]
the ionCube PHP Loader

detailes:
i use cloudlinux
i use cagefs
PHP version: 5.3.27
i use cgi loader PHP
i use cpanel

 

[NiteWave]

what's your lsws version ?

/opt/lsws/bin/lshttpd -v
/opt/lsws/bin/lshttpd -V