Error: ORA-16501: the Data Guard broker operation failed ORA

Error: ORA-16501: the Data Guard broker operation failed ORA-16625: cannot reach database solution

Create configuration file DGMGRL> create configuration 'sharkdbbork' as primary database is 'sharkdb' connect identifier is sharkdb; Error: ORA-16501: the Data Guard broker operation failedError: ORA-16625: cannot reach database "sharkdb" view log oracle @ dg: [/u01/app/database/diag/rdbms/posdg/sharkdb/trace] cat drcsharkdb. log 16:11:21. 758 ERROR: Connect Identifier sharkdb_dgmgrl not valid2013-08-30 16:11:21. 759 NSV0: Can't get db connect descriptor to database sharkdb (error = 16501) 16:11:21. 759 NSV0: Failed to connect to 0x010010002013-08-30 16:11:21. 759 NSV0: Failed to send message to site sharkdb. error code is ORA-16501.2013-08-30 16:11:21. 760 00000000 1450113128 DMON: failed to forward op ADD_DRC to site sharkdb with error ORA-165012013-08-30 16:11:21. 760 00000000 1450113128 DMON: Database Sharkdb returned ORA-165012013-08-30 16:11:21. 760 00000000 1450113128 for opcode = ADD_DRC, phase = NULL, req_id = 2.1.14501131282013-08-30 16:11:21. 761 00000000 1450113128 DMON: ADD_DRC operation completedoracle @ dg: [/u01/app/database/diag/rdbms/posdg/sharkdb/trace] ps-ef | grep dmonoracle 4589 1 0 Aug27? 00:00:00 ora_dmon_sharkdboracle 16577 16462 0 00:00:00 pts/3 grep -- color dmonoracle @ dg: [/u01/app/database/diag/rdbms/dg/sharkdb/trace] listening to normal LSNRCTL> statusConnecting to (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC) (KEY = LISTENER) STATUS of the LISTENER ------------------------ Alias LISTENERVersion TNSLSNR for Linux: Version 11.2.0.1.0-ProductionStart Date 28-AUG-2013 18: 40: 34 Uptime 1 days 21 hr. 46 min. 4 secTrace Level offSecurity ON: Local OS AuthenticationSNMP OFFListener Parameter File/u01/app/11.2.0/grid/network/admin/listener. oraListener Log File/u01/app/grid/diag/tnslsnr/node1/listener/alert/log. xmlListening Endpoints Summary... (DESCRIPTION = (ADDRESS = (PROTOCOL = ipc) (KEY = LISTENER) (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp) (HOST = 127.0.0.1) (PORT = 1521) Services Summary... service "sharkdb" has 1 instance (s ). instance "sharkdb", status UNKNOWN, has 1 handler (s) for this service... service "sharkdb_DGMGRL" has 1 instance (s ). instance "sharkdb", status UNKNOWN, has 1 handler (s) for this service... the command completed successfully