server just stops to receive values from custom check

[pturrr]

Guys, i have a question. I have a UserParameter which checks what i need and returns either 0,1 or 2. Based on return value triggers applies. All was ok for some time, but recently i noticed that application is not working, i looked into zabbix and seen this(Overview section):

2011.Oct.13 11:24:54 0
2011.Oct.13 11:24:24 0
2011.Oct.13 11:12:36 0
2011.Oct.13 11:09:23 2

So there is no data recevied for 12 mintues. Why? Application is in active state and everything seems to be ok. In logs i've noted the following:

This is when it OK:

14202:20111013:114002.138 In zbx_waitpid()
14202:20111013:114002.138 zbx_waitpid() exited, status:0
14202:20111013:114002.138 End of zbx_waitpid():15574
14202:20111013:114002.138 Run remote command [ /opt/zabbix/scripts/mapserv/check_transport.sh] Result [1] [0]...
14202:20111013:114002.138 Sending back [0]

What does zbx_waitpid means and when it applies??


This is when nothing returns:

14202:20111013:113959.758 Requested [TransportLayer]
14202:20111013:113959.758 In zbx_popen() command:' /opt/zabbix/scripts/mapserv/check_transport.sh'
14202:20111013:113959.758 End of zbx_popen():6
15574:20111013:113959.758 zbx_popen(): executing script


Any ideas?? Please help