Connecting sql developer to oracle 11g from lubuntu to centos

Question

I have Installed sql-developer on Lubuntu and I want to connect sql-developer to oracle 11g, oracle 11g installed in another system( Centos )and sql-developer installed( Lubuntu ) while testing the connectivity from sql-developer via tns service name its showing error as "Status -Test Failed: IO Error The Network Adapter Couldn't establish the connection" . TNSPING is working for service names and ping ip-address is also working in destination sever where we have installed oracle 11g database .

Please let me know to resolve this issue.

Thanks, Ranjithkumar

Answer 1

Could you please provide your TNS-Names File or the configuration of your SQL-Developer? The Error seems to occur because of a false Host-Definition. Be sure that you put in the right SID or Service name. If you assume that your configuration must be right, please Check your DNS- and firewall-Settings. Further you can change into the Oracle-Bin Folder and execute the "tnsping" binary with the Host as Parameter.