when server runs a global script command, it logs two sequential, identical log lines.

14917:20130207:145310.747 Trapper got [

{"request":"command","nodeid":0,"scriptid":"1","hostid":"10093"}

] len 64
14917:20130207:145310.747 In node_process_command()
14917:20130207:145310.747 In execute_script() scriptid:1 hostid:10093
14917:20130207:145310.747 query [txnlev:0] [select host,name from hosts where hostid=10093]
14917:20130207:145310.747 In zbx_execute_script()
14917:20130207:145310.748 In DBget_script_by_scriptid()
14917:20130207:145310.748 query [txnlev:0] [select type,execute_on,command,groupid from scripts where scriptid=1]
14917:20130207:145310.748 End of DBget_script_by_scriptid():SUCCEED
14917:20130207:145310.748 In check_script_permissions() groupid:0 hostid:10093
14917:20130207:145310.748 End of check_script_permissions():SUCCEED
14917:20130207:145310.748 In substitute_simple_macros() data:'/bin/ping -c 3

{HOST.CONN}

2>&1'
14917:20130207:145310.748 query [txnlev:0] [select type,useip,ip,dns from interface where hostid=10093 and type in (1,2,3,4) and main=1]
14917:20130207:145310.749 End substitute_simple_macros() data:'/bin/ping -c 3 192.168.5.107 2>&1'
14917:20130207:145310.749 In zbx_execute_script()
14917:20130207:145310.749 In zbx_popen() command:'/bin/ping -c 3 192.168.5.107 2>&1'
14917:20130207:145310.749 End of zbx_popen():8
14917:20130207:145312.758 In zbx_waitpid()
14917:20130207:145312.758 zbx_waitpid() exited, status:0
14917:20130207:145312.758 End of zbx_waitpid():23914
14917:20130207:145312.758 End of zbx_execute_script():SUCCEED
14917:20130207:145312.758 End of zbx_execute_script():SUCCEED
14917:20130207:145312.758 End of execute_script():SUCCEED

notice " 14917:20130207:145312.758 End of zbx_execute_script():SUCCEED"

a) it should be verified whether everything is ok there;
b) it should be verified that any forking is happening as expected