GUI does not open

Apache service

You can check ip addr command output to make sure you are using the correct IP.

Also make sure apache service is up and running.

netstat -vatupn | grep httpd

should show apache listening on port 80.

iptables

Turn off iptables:

/etc/init.d/iptables stop

If it helps - fix iptables rules or uninstall iptables (not recommended).

How to fix iptables rules - check iptables manual or better - consult specialist.

DB settings / HDD full

If you get such error - that means GUI cannot connect to DB.

• Check if HDD is full (df -h),
  • Free some space if so, find the reason why it become full - resolve it
  • Free /tmp folder (maybe too much files in it)
  • Log shows: Mysql2::Error: Got error 28 from storage engine
• Check /home/mor/config/database.yml and correct DB settings in [production] section.
• Check if MySQL is running.
• Check MySQL log for read errors.
• Check if your system has enough RAM

Apache cannot start

Apache log /var/log/httpd/error_log shows:

No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed

Checking your disk shows that you have plenty of space. The problem is that apache didn't shut down properly, and it's left myriads of semaphore-arrays left, owned by my apache-user. Run:

ipcs -s | grep apache | perl -e 'while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}'

Restart Apache:

/etc/init.d/httpd restart

Reason for this problem: unknown

Errors in /tmp/mor_crash.log

ActionView::TemplateError (undefined method...

Upgrade DB by running appropriate fix script.

Error 503 when opening GUI

After you perform yum upgrade on server, you get 503 error when opening GUI.

In server /var/log/httpd/error_log
You see a lot of:

[error] (13)Permission denied: mod_fcgid: couldn't bind unix domain socket /etc/httpd/logs/fcgidsock/8060.11    
                                        
[warn] (13)Permission denied: mod_fcgid: spawn process /var/www/html/billing/dispatch.fcgi error

This means that permission are mixed up, solution:

chmod 555 /etc/httpd/logs (this is a symlink to /var/httpd/logs)

Premature end of script headers: dispatch.fcgi

/etc/init.d/httpd stop
cd /usr/src/mor/sh_scripts
./centos_fcgid.sh
cp -fr /usr/src/mor/gui/* /home/mor
/etc/init.d/httpd start

This webpage has a redirect loop

When you get this error delete cookies in your web browser and try to open the page again.

Also, this error can appear if admin user (id=0) was removed from database.

cannot load such file -- bundler/setup (LoadError)

gem install bundler
cd /home/m2 OR cd /home/mor
bundle
/etc/init.d/httpd restart

Website is under heavy load

Edit file:

/etc/httpd/conf.d/passenger.conf

Add line:

PassengerMaxRequestQueueSize 150

Restart apache service:

service httpd restart

Error No space left on device

[Thu Oct 24 09:01:45.442926 2024] [suexec:notice] [pid 11549:tid 140536302729344] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Oct 24 09:01:45.443532 2024] [core:emerg] [pid 11549:tid 140536302729344] (28)No space left on device: AH00023: Couldn't create the ssl-cache mutex
AH00016: Configuration Failed

Step 1: Check Disk Space

Run the following command to check available disk space:

df -h

[root@serv ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        3,8G     0  3,8G   0% /dev
tmpfs           3,9G     0  3,9G   0% /dev/shm
tmpfs           3,9G   42M  3,8G   2% /run
tmpfs           3,9G     0  3,9G   0% /sys/fs/cgroup
/dev/sda1       250G   12G  239G   5% /
tmpfs           782M     0  782M   0% /run/user/0

If the disk is full, you will need to free up space.

Step 2: Check Inodes

If your disk has enough space but you still encounter this error, check the inode usage:

df -i

[root@serv ~]# df -i
Filesystem        Inodes  IUsed     IFree IUse% Mounted on
devtmpfs          993620    341    993279    1% /dev
tmpfs            1000796      1   1000795    1% /dev/shm
tmpfs            1000796    674   1000122    1% /run
tmpfs            1000796     16   1000780    1% /sys/fs/cgroup
/dev/sda1      131071424 261716 130809708    1% /
tmpfs            1000796      1   1000795    1% /run/user/0

Step 3: Clear Apache Shared Memory and Semaphores

If the disk or inodes are not full, but the error remains, run the following commands to list semaphores used by Apache:

ipcs -s | grep apache

[root@srv80096328 ~]# ipcs -s | grep apache
0x00000000 2          apache     600        1          
0x00000000 3          apache     600        1          
0x00000000 4          apache     600        1          
0x00000000 5          apache     600        1          
0x00000000 6          apache     600        1          
0x00000000 7          apache     600        1          
0x00000000 32776      apache     600        1          
0x00000000 32777      apache     600        1          
0x00000000 10         apache     600        1          
0x00000000 11         apache     600        1          
0x00000000 12         apache     600        1          
0x00000000 13         apache     600        1          
0x00000000 14         apache     600        1          
0x00000000 15         apache     600        1
...........
0x00000000 33490      apache     600        1          
0x00000000 33491      apache     600        1          
0x00000000 33492      apache     600        1          
0x00000000 33493      apache     600        1          
0x00000000 33494      apache     600        1          
0x00000000 33497      apache     600        1          
0x00000000 33498      apache     600        1          
0x00000000 33499      apache     600        1          
0x00000000 33500      apache     600        1          
0x00000000 33501      apache     600        1          
0x00000000 33502      apache     600        1

Remove the semaphores listed in the output:

ipcrm -s <ID>

Example:

ipcrm -s <15>
ipcrm -s <12>
ipcrm -s <32777>

Restart Apache after resolving disk space or inode issues.

systemctl restart httpd

Try to reboot the server if there are too many semaphores listed or the issue persists.

See also

• I have a problem with GUI