ARTICLE TYPE
Troubleshooting
TITLE
WAM does not want to Start/Restart
Product:
WAM
SYMPTOMS
Attempting to start WAM main Apache server.
Attempting to start WAM main Apache server...
Error: [-]
Error: [-] The following messages have been generated by Apache:
Error: [-]
Error: [-] Directory list created
Error: [-]
Error: [-] The following lines have been generated in the Apache error log:
Error: [-]
Error: [-] [Mon Jul 22 08:21:22.451134 2024] [:warn] [pid 3702675:tid 140123787631616] MOD_AUTH_CAS: CASValidateURL should be HTTPS.
Error: [-] [Mon Jul 22 08:22:51.285217 2024] [lbmethod_heartbeat:notice] [pid 3707044:tid 140123787631616] AH02282: No slotmem from mod_heartmonitor
ANSWER
Please verify the ipcs value in your WAM Server.
Troubleshooting Steps
ipcs help command
[root@oracle ~]# ipcs --h
ipcs: option '--h' is ambiguous; possibilities: '--human' '--help'
Try 'ipcs --help' for more information.
[root@oracle ~]# ipcs --help
Usage:
ipcs [resource-option...] [output-option]
ipcs -m|-q|-s -i <id>
Show information on IPC facilities.
Options:
-i, --id <id> print details on resource identified by <id>
-h, --help display this help
-V, --version display version
Resource options:
-m, --shmems shared memory segments
-q, --queues message queues
-s, --semaphores semaphores
-a, --all all (default)
Output options:
-t, --time show attach, detach and change times
-p, --pid show PIDs of creator and last operator
-c, --creator show creator and owner
-l, --limits show resource limits
-u, --summary show status summary
--human show sizes in human-readable format
-b, --bytes show sizes in bytes
For more details see ipcs(1).
How to check ipcs Value
[root@oracle ~]# ipcs -l
------ Messages Limits --------
max queues system wide = 32000
max size of message (bytes) = 8192
default max size of queue (bytes) = 16384
------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 18014398509465599
max total shared memory (kbytes) = 18446744073709551612
min seg size (bytes) = 1
------ Semaphore Limits --------
max number of arrays = 32000
max semaphores per array = 32000
max semaphores system wide = 1024000000
max ops per semop call = 500
semaphore max value = 32767
For WAM the advice is:
$ cat /proc/sys/kernel/sem
250 128000 32 512
This allows more web agents or portals to be configured.
It is possible to modify or add the following line in the sysctl.conf file (in /etc folder):
kernel.sem = 250 128000 32 512
(if the kernel.sem does not appear in the file, you can add it at the end of the file.
Then execute the following command to load it:
$ sysctl -p
Check it by:
$ cat /proc/sys/kernel/sem
NB:
To keep these modifications at each boot on SUSE Linux activate boot.sysctl command.
(On Red Hat Linux the script rc.sysinit reads the file /etc/sysctl.conf automatically).
Kindly check the below FAQ:
Lack of ipcs Value