IS admin error

hi all
when IS is up my JDBC pool like this error so ple any one can help

Restart Function Adapters Failed
[wm-cjdbc36-0007][Oracle JDBC Driver]Error establishing socket. Unknown host: naga-f1803aef71

ple…help me…

Please make sure if the target db is up and running…better contact your DBA or network folks if any network issues going on: