# \[SLES 12 SP3\] - WebServer Apache2 installed twice

**URL:** <https://forums.suse.com/t/sles-12-sp3-webserver-apache2-installed-twice/33282>\
**Category:** SLES Configure-Administer\
**Created:** [December 6, 2018, 3:21pm UTC](https://forums.suse.com/t/sles-12-sp3-webserver-apache2-installed-twice/33282 "2018-12-06T15:21:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tester\_ssc](https://avatars.discourse-cdn.com/v4/letter/t/d9b06d/32.png) [@tester\_ssc](https://forums.suse.com/u/tester_ssc)\
**Post date:** [December 6, 2018, 3:21pm UTC](https://forums.suse.com/t/sles-12-sp3-webserver-apache2-installed-twice/33282/1 "2018-12-06T15:21:46Z")

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Hello Community,

i have a question. Is it possible to deinstall MPM Apache2 [COLOR="#0000FF"]worker [/COLOR]withot any risk and switch to MPM Apache2 [COLOR="#008000"]prefork[/COLOR]?

Or how can I safely switch to the MPM Apache2 [COLOR="#008000"]prefork [/COLOR]without stopping an application?

PHP7.0.7 is currently reporting with existing [COLOR="#0000FF"]worker [/COLOR]mpm:

Dec 05 13:05:34 localhost start\_apache2[23269]: [Wed Dec 05 13:05:34.023391 2018] [:crit] [pid 23269:tid 140421080238272] Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe. You need to recompile PHP.  
Dec 05 13:05:34 localhost start\_apache2[23269]: AH00013: Pre-configuration failed

Details:

apache2ctl -V  
Server version: Apache/2.4.23 (Linux/SUSE)  
Server built: 2018-08-21 14:36:58.000000000 +0000  
Server’s Module Magic Number: 20120211:61  
Server loaded: APR 1.5.1, APR-UTIL 1.5.3  
Compiled using: APR 1.5.1, APR-UTIL 1.5.3  
Architecture: 64-bit  
Server MPM: [COLOR="#0000FF"]worker[/COLOR]  
threaded: yes (fixed thread count)  
forked: yes (variable process count)  
Server compiled with…  
-D APR\_HAS\_SENDFILE  
-D APR\_HAS\_MMAP  
-D APR\_HAVE\_IPV6 (IPv4-mapped addresses enabled)  
-D APR\_USE\_PROC\_PTHREAD\_SERIALIZE  
-D APR\_USE\_PTHREAD\_SERIALIZE  
-D SINGLE\_LISTEN\_UNSERIALIZED\_ACCEPT  
-D APR\_HAS\_OTHER\_CHILD  
-D AP\_HAVE\_RELIABLE\_PIPED\_LOGS  
-D DYNAMIC\_MODULE\_LIMIT=256  
-D HTTPD\_ROOT="/srv/www"  
-D SUEXEC\_BIN="/usr/sbin/suexec"  
-D DEFAULT\_PIDLOG="/run/httpd.pid"  
-D DEFAULT\_SCOREBOARD=“logs/apache\_runtime\_status”  
-D DEFAULT\_ERRORLOG="/var/log/apache2/error\_log"  
-D AP\_TYPES\_CONFIG\_FILE="/etc/apache2/mime.types"  
-D SERVER\_CONFIG\_FILE="/etc/apache2/httpd.conf"

rpm -qa | grep -i apache2  
apache2-[COLOR="#008000"]prefork[/COLOR]-2.4.23-29.24.1.x86\_64  
apache2-mod\_php7-7.0.7-9.1.x86\_64  
apache2-2.4.23-29.24.1.x86\_64  
apache2-utils-2.4.23-29.24.1.x86\_64  
apache2-[COLOR="#0000FF"]worker[/COLOR]-2.4.23-29.24.1.x86\_64

Yast2 also displays both MPM Apache2.  
 ![](https://tinyurl.com/yadwens3)

This is a PRODUCTIVE system and therefore no risk should be taken.

Welcome to SUSE Linux Enterprise Server 12 SP3 (x86\_64) - Kernel

Thank you so much for your help

garagenclown

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**Author:** ![Jens-U](https://avatars.discourse-cdn.com/v4/letter/j/d78d45/32.png) [@Jens-U](https://forums.suse.com/u/Jens-U)\
**Post date:** [December 6, 2018, 4:47pm UTC](https://forums.suse.com/t/sles-12-sp3-webserver-apache2-installed-twice/33282/2 "2018-12-06T16:47:52Z")

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Hi garagenclown,

please have a look at /etc/sysconfig/apache2, especially “APACHE\_MPM”:

[CODE]## Type: list(prefork,worker,event,itk)

## Default: “”

## ServiceRestart: apache2

# 

# MPM (multi-processing module) to use.

# 

# Needed to determine with which MPM apache will run, as well as

# against which header files modules will be built.

# 

# If not set, the system will simply pick one of the installed MPMs.

# 

# The implementation of the logic is in /usr/share/apache2/find\_mpm,

# a script which can be used standalone as well if needed.

# 

APACHE\_MPM=“”  
[/CODE]

Regards,  
J

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**Author:** ![tester\_ssc](https://avatars.discourse-cdn.com/v4/letter/t/d9b06d/32.png) [@tester\_ssc](https://forums.suse.com/u/tester_ssc)\
**Post date:** [December 6, 2018, 10:11pm UTC](https://forums.suse.com/t/sles-12-sp3-webserver-apache2-installed-twice/33282/3 "2018-12-06T22:11:01Z")

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Hi J,

thank you very much. It works like a charm.

`[FONT=Arial Narrow]apache2ctl -V
Server version: Apache/2.4.23 (Linux/SUSE)
Server built: 2018-08-21 14:36:58.000000000 +0000
Server's Module Magic Number: 20120211:61
Server loaded: APR 1.5.1, APR-UTIL 1.5.3
Compiled using: APR 1.5.1, APR-UTIL 1.5.3
Architecture: 64-bit
Server MPM: [COLOR="#008000"]prefork[/COLOR]
  threaded: no
    forked: yes (variable process count)
Server compiled with....
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_PROC_PTHREAD_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=256
 -D HTTPD_ROOT="/srv/www"
 -D SUEXEC_BIN="/usr/sbin/suexec"
 -D DEFAULT_PIDLOG="/run/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="/var/log/apache2/error_log"
 -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types"
 -D SERVER_CONFIG_FILE="/etc/apache2/httpd.conf"[/FONT]`