zabbixServer (1.5.3) stops

[kc5kse]

Would like to know why zabbix_server just stops.

Debug set to 4 gets the following:

2921:20080630:163628 In node_history()
2921:20080630:163628 Query [begin;]
2913:20080630:163628 One child process died. Exiting ...
2917:20080630:163628 Got signal. Exiting ...
2915:20080630:163628 Got signal. Exiting ...
2919:20080630:163628 Got signal. Exiting ...
2916:20080630:163628 Got signal. Exiting ...
2927:20080630:163628 Got signal. Exiting ...
2939:20080630:163628 Got signal. Exiting ...
2918:20080630:163628 Got signal. Exiting ...
2942:20080630:163628 Got signal. Exiting ...
2933:20080630:163628 Got signal. Exiting ...
2946:20080630:163628 Got signal. Exiting ...
2923:20080630:163628 Got signal. Exiting ...
2941:20080630:163628 Got signal. Exiting ...
2932:20080630:163628 Got signal. Exiting ...
2925:20080630:163628 Got signal. Exiting ...
2937:20080630:163628 Got signal. Exiting ...
2929:20080630:163628 Got signal. Exiting ...
2944:20080630:163628 Got signal. Exiting ...
2920:20080630:163628 Got signal. Exiting ...
2913:20080630:163630 Query [SET CHARACTER SET utf8]
2913:20080630:163630 ZABBIX Server stopped. ZABBIX 1.5.3.

Any help would be greatly appreciated.