https://bz.apache.org/bugzilla/show_bug.cgi?id=63783
Bug ID: 63783
Summary: Apachectl configtest did not warn on a configuration
error
Product: Apache httpd-2
Version: 2.4.6
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Core
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
While progressively disabling modules I don't need for my application, I found
an issue with apachectl configtest returning Syntax OK, but the restart of
httpd failing.
When I comment out:
LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
And do a sudo apachectl configtest I get back "Syntax OK" but when I do a sudo
apachectl restart I get back "Job for httpd.service failed because the control
process exited with error code. See "systemctl status httpd.service" and
"journalctl -xe" for details."
Now, neither of those locations gave me anything useful, but when I look at
/var/log/httpd/error_log, I get back:
[Mon Sep 23 00:16:52.992948 2019] [core:notice] [pid 1467] SELinux policy
enabled; httpd running as context system_u:system_r:httpd_t:s0
[Mon Sep 23 00:16:52.994536 2019] [suexec:notice] [pid 1467] AH01232: suEXEC
mechanism enabled (wrapper: /usr/sbin/suexec)
[Mon Sep 23 00:16:53.008462 2019] [lbmethod_heartbeat:notice] [pid 1467]
AH02281: Failed to lookup provider 'shm' for 'slotmem'. Maybe you need to load
mod_slotmem_shm?
[Mon Sep 23 00:16:53.008478 2019] [proxy_balancer:emerg] [pid 1467] AH01177:
Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded??
[Mon Sep 23 00:16:53.008485 2019] [:emerg] [pid 1467] AH00020: Configuration
Failed, exiting
Now I am running (and will need to for my application) proxy_balancer and
lbmethod_heartbeat and when I look at the Apache documentation for
lbmethod_heartbeat I see the HeartbeatStorage directive offers an alternate
location for heartbeat data, SHOULD mod_slotmem_shm not be loaded.
I believe apachectl configtest should have returned a syntax error in that
mod_slotmem_shm wasn't loaded but there was no HearbeatStorage directive to
make up for it.
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