Apache not working in new installation.

I just install Centos 6, update it and install centos-webpanel.
I tried for 2 days now and it seems that Apache did not start.
Do you have a fix for this?

check the error log what errors in it ?

Hi.. Apache error log is as shown..

[Wed Apr 19 05:56:02.001932 2017] [mpm_event:notice] [pid 1748:tid 140082150246144] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 05:56:02.002111 2017] [core:notice] [pid 1748:tid 140082150246144] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 05:56:02.002290 2017] [mpm_event:alert] [pid 1785:tid 140082069280512] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:02.002279 2017] [mpm_event:alert] [pid 1784:tid 140082069280512] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:02.002337 2017] [mpm_event:alert] [pid 1787:tid 140082150246144] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:04.004136 2017] [mpm_event:alert] [pid 1748:tid 140082150246144] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 05:56:19.002295 2017] [mpm_event:notice] [pid 1878:tid 140203720673024] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 05:56:19.002480 2017] [core:notice] [pid 1878:tid 140203720673024] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 05:56:19.002814 2017] [mpm_event:alert] [pid 1883:tid 140203639707392] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:19.002800 2017] [mpm_event:alert] [pid 1884:tid 140203639707392] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:19.002825 2017] [mpm_event:alert] [pid 1882:tid 140203639707392] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:21.004666 2017] [mpm_event:alert] [pid 1878:tid 140203720673024] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 05:58:00.001562 2017] [mpm_event:notice] [pid 2963:tid 140646926903040] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 05:58:00.001702 2017] [core:notice] [pid 2963:tid 140646926903040] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 05:58:00.002153 2017] [mpm_event:alert] [pid 2979:tid 140646845937408] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:58:00.002149 2017] [mpm_event:alert] [pid 2980:tid 140646845937408] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:58:00.002148 2017] [mpm_event:alert] [pid 2981:tid 140646845937408] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:58:02.002689 2017] [mpm_event:alert] [pid 2963:tid 140646926903040] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:00:29.002621 2017] [mpm_event:notice] [pid 973:tid 140299634038528] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:00:29.008021 2017] [core:notice] [pid 973:tid 140299634038528] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:00:29.002980 2017] [mpm_event:alert] [pid 1027:tid 140299634038528] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:00:29.002991 2017] [mpm_event:alert] [pid 1026:tid 140299553072896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:00:29.002983 2017] [mpm_event:alert] [pid 1025:tid 140299553072896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:00:31.009535 2017] [mpm_event:alert] [pid 973:tid 140299634038528] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:04:39.001144 2017] [core:warn] [pid 1592:tid 140298914166528] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:04:39.002301 2017] [mpm_event:notice] [pid 1592:tid 140298914166528] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:04:39.002342 2017] [core:notice] [pid 1592:tid 140298914166528] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:04:39.002632 2017] [mpm_event:alert] [pid 1615:tid 140298833200896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:04:39.002647 2017] [mpm_event:alert] [pid 1614:tid 140298833200896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:04:39.002728 2017] [mpm_event:alert] [pid 1616:tid 140298914166528] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:04:41.004528 2017] [mpm_event:alert] [pid 1592:tid 140298914166528] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:12:37.001150 2017] [core:warn] [pid 16333:tid 140593791702784] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:12:37.002280 2017] [mpm_event:notice] [pid 16333:tid 140593791702784] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:12:37.002317 2017] [core:notice] [pid 16333:tid 140593791702784] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:12:37.002492 2017] [mpm_event:alert] [pid 16773:tid 140593791702784] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:37.002654 2017] [mpm_event:alert] [pid 16774:tid 140593791702784] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:37.002695 2017] [mpm_event:alert] [pid 16772:tid 140593710737152] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:39.003427 2017] [mpm_event:alert] [pid 16333:tid 140593791702784] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:12:48.001468 2017] [mpm_event:notice] [pid 23025:tid 140574759360256] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:12:48.001591 2017] [core:notice] [pid 23025:tid 140574759360256] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:12:48.001626 2017] [mpm_event:alert] [pid 23732:tid 140574678394624] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:48.001730 2017] [mpm_event:alert] [pid 23733:tid 140574759360256] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:48.001844 2017] [mpm_event:alert] [pid 23734:tid 140574759360256] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:50.003482 2017] [mpm_event:alert] [pid 23025:tid 140574759360256] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:15:01.002222 2017] [mpm_event:notice] [pid 29959:tid 139644585420544] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:01.002358 2017] [core:notice] [pid 29959:tid 139644585420544] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:01.002355 2017] [mpm_event:alert] [pid 30015:tid 139644504454912] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:01.002393 2017] [mpm_event:alert] [pid 30016:tid 139644585420544] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:01.002575 2017] [mpm_event:alert] [pid 30017:tid 139644585420544] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.000504 2017] [core:warn] [pid 30020:tid 140646818129664] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:15:02.001968 2017] [mpm_event:notice] [pid 30020:tid 140646818129664] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:02.002009 2017] [core:notice] [pid 30020:tid 140646818129664] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:02.002123 2017] [mpm_event:alert] [pid 30040:tid 140646737164032] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.002140 2017] [mpm_event:alert] [pid 30041:tid 140646818129664] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.002524 2017] [mpm_event:alert] [pid 30042:tid 140646818129664] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.497456 2017] [mpm_event:notice] [pid 30020:tid 140646818129664] AH00491: caught SIGTERM, shutting down
[Wed Apr 19 06:15:03.004384 2017] [mpm_event:alert] [pid 29959:tid 139644585420544] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:15:04.001770 2017] [mpm_event:notice] [pid 30077:tid 139932862600960] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:04.001924 2017] [core:notice] [pid 30077:tid 139932862600960] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:04.001857 2017] [mpm_event:alert] [pid 30129:tid 139932862600960] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:04.001842 2017] [mpm_event:alert] [pid 30128:tid 139932781635328] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:04.002083 2017] [mpm_event:alert] [pid 30131:tid 139932862600960] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:05.000339 2017] [core:warn] [pid 30133:tid 140312143419136] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:15:05.001880 2017] [mpm_event:notice] [pid 30133:tid 140312143419136] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:05.001923 2017] [core:notice] [pid 30133:tid 140312143419136] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:05.002031 2017] [mpm_event:alert] [pid 30161:tid 140312143419136] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:05.002026 2017] [mpm_event:alert] [pid 30160:tid 140312062453504] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:05.002303 2017] [mpm_event:alert] [pid 30162:tid 140312143419136] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:06.003011 2017] [mpm_event:alert] [pid 30077:tid 139932862600960] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:15:07.003221 2017] [mpm_event:alert] [pid 30133:tid 140312143419136] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!

This seems like RAM problem? But it is working fine in previous version of Centos Webpanel.

My Vps is running on 768MB
here is my system info

Operating System   CentOS 6.5 64bit
IPv6 Address   0
Disk Space   50 GB
Bandwidth   1000 GB
Memory   768 MB
Burst   1 GB

Hi.. Apache error log is as shown..

[Wed Apr 19 05:56:02.001932 2017] [mpm_event:notice] [pid 1748:tid 140082150246144] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 05:56:02.002111 2017] [core:notice] [pid 1748:tid 140082150246144] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 05:56:02.002290 2017] [mpm_event:alert] [pid 1785:tid 140082069280512] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:02.002279 2017] [mpm_event:alert] [pid 1784:tid 140082069280512] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:02.002337 2017] [mpm_event:alert] [pid 1787:tid 140082150246144] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:04.004136 2017] [mpm_event:alert] [pid 1748:tid 140082150246144] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 05:56:19.002295 2017] [mpm_event:notice] [pid 1878:tid 140203720673024] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 05:56:19.002480 2017] [core:notice] [pid 1878:tid 140203720673024] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 05:56:19.002814 2017] [mpm_event:alert] [pid 1883:tid 140203639707392] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:19.002800 2017] [mpm_event:alert] [pid 1884:tid 140203639707392] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:19.002825 2017] [mpm_event:alert] [pid 1882:tid 140203639707392] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:56:21.004666 2017] [mpm_event:alert] [pid 1878:tid 140203720673024] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 05:58:00.001562 2017] [mpm_event:notice] [pid 2963:tid 140646926903040] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 05:58:00.001702 2017] [core:notice] [pid 2963:tid 140646926903040] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 05:58:00.002153 2017] [mpm_event:alert] [pid 2979:tid 140646845937408] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:58:00.002149 2017] [mpm_event:alert] [pid 2980:tid 140646845937408] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:58:00.002148 2017] [mpm_event:alert] [pid 2981:tid 140646845937408] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 05:58:02.002689 2017] [mpm_event:alert] [pid 2963:tid 140646926903040] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:00:29.002621 2017] [mpm_event:notice] [pid 973:tid 140299634038528] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:00:29.008021 2017] [core:notice] [pid 973:tid 140299634038528] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:00:29.002980 2017] [mpm_event:alert] [pid 1027:tid 140299634038528] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:00:29.002991 2017] [mpm_event:alert] [pid 1026:tid 140299553072896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:00:29.002983 2017] [mpm_event:alert] [pid 1025:tid 140299553072896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:00:31.009535 2017] [mpm_event:alert] [pid 973:tid 140299634038528] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:04:39.001144 2017] [core:warn] [pid 1592:tid 140298914166528] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:04:39.002301 2017] [mpm_event:notice] [pid 1592:tid 140298914166528] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:04:39.002342 2017] [core:notice] [pid 1592:tid 140298914166528] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:04:39.002632 2017] [mpm_event:alert] [pid 1615:tid 140298833200896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:04:39.002647 2017] [mpm_event:alert] [pid 1614:tid 140298833200896] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:04:39.002728 2017] [mpm_event:alert] [pid 1616:tid 140298914166528] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:04:41.004528 2017] [mpm_event:alert] [pid 1592:tid 140298914166528] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:12:37.001150 2017] [core:warn] [pid 16333:tid 140593791702784] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:12:37.002280 2017] [mpm_event:notice] [pid 16333:tid 140593791702784] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:12:37.002317 2017] [core:notice] [pid 16333:tid 140593791702784] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:12:37.002492 2017] [mpm_event:alert] [pid 16773:tid 140593791702784] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:37.002654 2017] [mpm_event:alert] [pid 16774:tid 140593791702784] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:37.002695 2017] [mpm_event:alert] [pid 16772:tid 140593710737152] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:39.003427 2017] [mpm_event:alert] [pid 16333:tid 140593791702784] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:12:48.001468 2017] [mpm_event:notice] [pid 23025:tid 140574759360256] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:12:48.001591 2017] [core:notice] [pid 23025:tid 140574759360256] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:12:48.001626 2017] [mpm_event:alert] [pid 23732:tid 140574678394624] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:48.001730 2017] [mpm_event:alert] [pid 23733:tid 140574759360256] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:48.001844 2017] [mpm_event:alert] [pid 23734:tid 140574759360256] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:12:50.003482 2017] [mpm_event:alert] [pid 23025:tid 140574759360256] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:15:01.002222 2017] [mpm_event:notice] [pid 29959:tid 139644585420544] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:01.002358 2017] [core:notice] [pid 29959:tid 139644585420544] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:01.002355 2017] [mpm_event:alert] [pid 30015:tid 139644504454912] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:01.002393 2017] [mpm_event:alert] [pid 30016:tid 139644585420544] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:01.002575 2017] [mpm_event:alert] [pid 30017:tid 139644585420544] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.000504 2017] [core:warn] [pid 30020:tid 140646818129664] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:15:02.001968 2017] [mpm_event:notice] [pid 30020:tid 140646818129664] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:02.002009 2017] [core:notice] [pid 30020:tid 140646818129664] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:02.002123 2017] [mpm_event:alert] [pid 30040:tid 140646737164032] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.002140 2017] [mpm_event:alert] [pid 30041:tid 140646818129664] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.002524 2017] [mpm_event:alert] [pid 30042:tid 140646818129664] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:02.497456 2017] [mpm_event:notice] [pid 30020:tid 140646818129664] AH00491: caught SIGTERM, shutting down
[Wed Apr 19 06:15:03.004384 2017] [mpm_event:alert] [pid 29959:tid 139644585420544] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:15:04.001770 2017] [mpm_event:notice] [pid 30077:tid 139932862600960] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:04.001924 2017] [core:notice] [pid 30077:tid 139932862600960] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:04.001857 2017] [mpm_event:alert] [pid 30129:tid 139932862600960] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:04.001842 2017] [mpm_event:alert] [pid 30128:tid 139932781635328] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:04.002083 2017] [mpm_event:alert] [pid 30131:tid 139932862600960] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:05.000339 2017] [core:warn] [pid 30133:tid 140312143419136] AH00098: pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Wed Apr 19 06:15:05.001880 2017] [mpm_event:notice] [pid 30133:tid 140312143419136] AH00489: Apache/2.4.25 (Unix) configured -- resuming normal operations
[Wed Apr 19 06:15:05.001923 2017] [core:notice] [pid 30133:tid 140312143419136] AH00094: Command line: '/usr/local/apache/bin/httpd'
[Wed Apr 19 06:15:05.002031 2017] [mpm_event:alert] [pid 30161:tid 140312143419136] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:05.002026 2017] [mpm_event:alert] [pid 30160:tid 140312062453504] (11)Resource temporarily unavailable: AH03104: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:05.002303 2017] [mpm_event:alert] [pid 30162:tid 140312143419136] (11)Resource temporarily unavailable: AH00480: apr_thread_create: unable to create worker thread
[Wed Apr 19 06:15:06.003011 2017] [mpm_event:alert] [pid 30077:tid 139932862600960] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!
[Wed Apr 19 06:15:07.003221 2017] [mpm_event:alert] [pid 30133:tid 140312143419136] AH02324: A resource shortage or other unrecoverable failure was encountered before any child process initialized successfully... httpd is exiting!

I am still waiting for reply..
I tried to reinstall the server and do following CWP instruction. I still cannot start Apache.
I think the problem is with CWP itself. Can you verify?

This is my latest error log.
[root@lucky ~]# tail /var/log/httpd/error_log
[Thu Apr 20 06:30:19 2017] [notice] Apache/2.2.15 (Unix) DAV/2 configured -- res                                                                                        uming normal operations
[Thu Apr 20 06:31:32 2017] [error] [client 220.181.108.162] Directory index forb                                                                                        idden by Options directive: /var/www/html/
[Thu Apr 20 06:35:32 2017] [error] [client 137.74.201.108] File does not exist:                                                                                         /var/www/html/china-book-fair-in-damai
[Thu Apr 20 06:36:39 2017] [notice] caught SIGTERM, shutting down
[Thu Apr 20 06:36:55 2017] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin                                                                                        /suexec)
[Thu Apr 20 06:36:55 2017] [notice] Digest: generating secret for digest authent                                                                                        ication ...
[Thu Apr 20 06:36:55 2017] [notice] Digest: done
[Thu Apr 20 06:36:56 2017] [notice] Apache/2.2.15 (Unix) DAV/2 configured -- res                                                                                        uming normal operations
[Thu Apr 20 06:37:17 2017] [error] [client 202.46.55.157] Directory index forbid                                                                                        den by Options directive: /var/www/html/
[Thu Apr 20 06:37:58 2017] [notice] caught SIGTERM, shutting down
[root@lucky ~]#

what so install now?

I see apache 2.2.15 now after 2.4.X

Issue solved. I asked my vps provider to change my vps and then they help me to install it.
Still got other issue but will open a new topic.