Semaphore problems

[LoZio]

Im' running FreeBSD 7 (FreeBSD zabbix 7.0-RELEASE-p4 FreeBSD 7.0-RELEASE-p4 #0: Tue Sep 2 19:32:35 UTC 2008 [email protected]:/usr/obj/usr/src/sys/GENERIC i386).

After upgrading from 1.4 to 1.6 the zabbix_server does not start anymore. Looking around I found this should be the well known "recreate semaphore" problem.


Message Queues:
T ID KEY MODE OWNER GROUP

Shared Memory:
T ID KEY MODE OWNER GROUP
m 65536 2052257578 --rw-rw-rw- zabbix zabbix

Semaphores:
T ID KEY MODE OWNER GROUP
s 65536 2052197255 --rw-rw-rw- zabbix zabbix
s 65537 2052257578 --rw-rw-rw- zabbix zabbix

I can fix it manually doing ipcrm -s 65536 and 65537 and restarting the server, but it renders the machine unable to boot unassisted...

Any idea?

[Alexei]

Try to remove the shared resources using command 'ipcrm'. The well known problem has been fixed in 1.6, I am pretty sure it will disappear from your system as well.

[LoZio]

Thanks for the reply.
I'm *using* 1.6, after upgrading from 1.4.
Using ipcrm i can have Zabbix start, but after a reboot there's the same problema again.

Also I noted, but this is a problem related probably to the way FreeBSD processes startup scripts, you need to indicate the dependency from MySQL (this sounds reasonable..).
Also you need to wait a couple of seconds before trying to start Zabbix (i put a bare "sleep 2s"), since the mysql.sock file seems to be created some instants after the startup of mysqld, and this prevents Zabbix from starting (cant' connect to mysql using /tmp/mysql.sock).
Hope this can help other FreeBSD users.

The base problem is that semaphore is still with us, in 1.6.
Bye

[txalin]

Hi all,

I have a zabbix 1.4.6 solution deployed on my company, i encounter for first time this semaphore issue on an aix 5.3, when i try ro execute the zabbix_agentd with a user different to zabbix. I fixed it using ipcrm command, but i have a question.

If we have to reboot the machine, will the semaphore and shared memory be created for the zabbix user again, even if i have changed the owner of zabbix_agentd and zabbix_agentd.conf?

Thx for reply