while zabbix server tries to survive database down conditions, sometimes it does die with signal 6 (sigabrt)

19119:20120210:104009.143 server #681 started history syncer #30
19119:20120210:113143.724 [Z3005] query failed: [-1] ORA-04031: unable to allocate 3912 bytes of shared memory
18410:20120210:113143.760 One child process died (PID:19119,exitcode/signal:6). Exiting ...

for the record, there seemed to be other message occurrences like that, which didn't seem to result in immediate process death (although it might be just a question of time)

19150:20120210:113143.691 [Z3005] query failed: [-1] ORA-04031: unable to allocate 4120 bytes of shared memory
19119:20120210:113143.724 [Z3005] query failed: [-1] ORA-04031: unable to allocate 3912 bytes of shared memory
19114:20120210:113143.725 [Z3005] query failed: [-1] ORA-04031: unable to allocate 4104 bytes of shared memory
19141:20120210:113143.782 [Z3005] query failed: [-1] ORA-04031: unable to allocate 4104 bytes of shared memory
19104:20120210:113143.849 [Z3005] query failed: [-1] ORA-04031: unable to allocate 1560 bytes of shared memory
18410:20120210:113239.779 [Z3005] query failed: [-1] ORA-03113: end-of-file on communication channel
18410:20120210:113241.236 [Z3005] query failed: [-1] ORA-03113: end-of-file on communication channel
18410:20120210:113251.252 [Z3001] connection to database '//oracle:1521/O' failed: [-1] ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
18410:20120210:113301.254 [Z3001] connection to database '//oracle:1521/O' failed: [-1] ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
18410:20120210:113311.256 [Z3001] connection to database '//oracle:1521/O' failed: [-1] ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
18410:20120210:113321.258 [Z3001] connection to database '//oracle:1521/O' failed: [-1] ORA-12528: TNS:listener: all appropriate instances are blocking new connections
18410:20120210:113331.280 [Z3001] connection to database '//oracle:1521/O' failed: [-1] ORA-01033: ORACLE initialization or shutdown in progress