problems centos 7 httpd service restart - linux

Question

when I type systemctl restart httpd ,
I get the following error:
Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.
en when I type systemctl status httpd.service
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled)
Active: failed (Result: exit-code) since Wed 2020-07-01 00:45:46 COT; 16s ago
Process: 1927 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=0/SUCCESS)
Process: 23178 ExecReload=/usr/sbin/httpd $OPTIONS -k graceful (code=exited, status=0/SUCCESS)
Process: 1925 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
Main PID: 1925 (code=exited, status=1/FAILURE)
Status: "Total requests: 657; Current requests/sec: -30.7; Current traffic: 0 B/sec"
Jul 01 00:45:46 sitio.co systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Jul 01 00:45:46 sitio.co systemd[1]: Failed to start The Apache HTTP Server.
Jul 01 00:45:46 sitio.co systemd[1]: Unit httpd.service entered failed state.
Hint: Some lines were ellipsized, use -l to show in full.
for journalctl -xe
Jul 01 01:05:01 sitio.co CROND[2219]: (root) CMD (/usr/local/maldetect/maldet --mkpubpaths >> /dev/null 2>&1)
Jul 01 01:09:23 sitio.co systemd[1]: Starting The Apache HTTP Server...
-- Subject: Unit httpd.service has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has begun starting up.
Jul 01 01:09:24 sitio.co systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Jul 01 01:09:24 sitio.co systemd[1]: Failed to start The Apache HTTP Server.
-- Subject: Unit httpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has failed.
--
-- The result is failed.
Jul 01 01:09:24 sitio.co systemd[1]: Unit httpd.service entered failed state.
Jul 01 01:09:48 sitio.co postfix/qmgr[2155]: 968D275E: from=<root#sitio.co>, size=3215, nrcpt=1 (queue active)
Jul 01 01:09:48 sitio.co postfix/smtp[2303]: warning: database /etc/postfix/generic.db is older than source file /etc/postfix/generic
Jul 01 01:09:49 sitio.co postfix/smtp[2303]: 968D275E: to=<sistemas.revistas#correounivalle.edu.co>, relay=smtp.gmail.com[173.194.217.109]:587, delay=42
Jul 01 01:10:01 sitio.co systemd[1]: Created slice user-0.slice.
-- Subject: Unit user-0.slice has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit user-0.slice has finished starting up.
--
-- The start-up result is done.
Jul 01 01:10:01 sitio.co systemd[1]: Starting Session 76464 of user root.
-- Subject: Unit session-76464.scope has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit session-76464.scope has begun starting up.
Jul 01 01:10:01 sitio.co systemd[1]: Started Session 76464 of user root.
-- Subject: Unit session-76464.scope has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit session-76464.scope has finished starting up.
--
-- The start-up result is done.
Jul 01 01:10:01 sitio.co CROND[2306]: (root) CMD (/usr/local/maldetect/maldet --mkpubpaths >> /dev/null 2>&1)
and for systemctl status httpd.service -l
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled)
Active: failed (Result: exit-code) since Wed 2020-07-01 01:09:24 COT; 4min 24s ago
Process: 2296 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=0/SUCCESS)
Process: 23178 ExecReload=/usr/sbin/httpd $OPTIONS -k graceful (code=exited, status=0/SUCCESS)
Process: 2294 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
Main PID: 2294 (code=exited, status=1/FAILURE)
Status: "Total requests: 657; Current requests/sec: -30.7; Current traffic: 0 B/sec"
Jul 01 01:09:24 sitio.co systemd1: httpd.service: main process
exited, code=exited, status=1/FAILURE
Jul 01 01:09:24 sitio.co systemd1: Failed to start The Apache HTTP
Server.
Jul 01 01:09:24 sitio.co systemd1: Unit httpd.service entered failed
state.
look the last logs:
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Answer 1

Stop the Apache httpd service and check semaphore usage owned by the apache user.
ipcs -s
Execute the following command to clear semaphore used by Apache user.
ipcs -s | awk -v user=apache '$3==user {system("ipcrm -s "$2)}'
You can refer Link for more information.

Answer 2

fix error by running
$ apachectl configtest