attempting to start 3 zabbix_proxy processes on same system, all using sqlite db (different ones).

only one process starts up, two further processes fail. initially they log :

zabbix_proxy [21420]: php_sem_get: Can not create IPC key for path '/tmp/zabbix_proxy2.db', try to create for path '.' [No such file or directory]
zabbix_proxy [21420]: php_sem_get: failed acquiring SYSVSEM_SETVAL for key 0x7a010002: Identifier removed
zabbix_proxy [21420]: php_sem_get: failed for key 0x7a010002: Identifier removed
zabbix_proxy [21420]: php_sem_get: failed releasing SYSVSEM_SETVAL for key 0x7a010002: Identifier removed
21420:20101209:135858.405 Cannot open database file "/tmp/zabbix_proxy2.db": No such file or directory
21420:20101209:135858.405 Creating database ...
zabbix_proxy [21420]: php_sysvsem_semop: failed to acquire semaphore (id 950277): Identifier removed
21420:20101209:135858.410 ERROR: Unable to create lock on SQLite database

killing and attempting to start them again results in :

22273:20101209:142455.502 Starting Zabbix Proxy. Zabbix 1.8.4rc2 (revision

{ZABBIX_REVISION}

).
22273:20101209:142455.503 **** Enabled features ****
22273:20101209:142455.503 SNMP monitoring: YES
22273:20101209:142455.503 IPMI monitoring: NO
22273:20101209:142455.503 ODBC: NO
22273:20101209:142455.503 SSH2 support: NO
22273:20101209:142455.503 IPv6 support: NO
22273:20101209:142455.504 **************************
zabbix_proxy [22273]: php_sem_get: Can not create IPC key for path '/tmp/zabbix_proxy2.db', try to create for path '.' [No such file or directory]

zabbix_proxy process does not seem to do anything and attaching strace to it it produces :

semop(983045, {{2, 0, 0},

{2, 1, SEM_UNDO}

, {1, 1, SEM_UNDO}}, 3

stopping all zabbix processes revealed 3 dangling semaphore arrays, belonging to zabbix user. removing all 3 of them with ipcrm allowed all proxy processes to start up successfully