리스너 스타트 할려고 하는데 에러가 나네요

이걸 어떻게 해결해야 할지

LSNRCTL> start lsnr
Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/lsnr.logError listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=osrv102.oramaster)(PORT=1521)))
TNS-12542: TNS:address already in use
 TNS-12560: TNS:protocol adapter error
  TNS-00512: Address already in use
   Linux Error: 98: Address already in use


어떻게 해결 해야 하나요

리스너 만들고 실행할려고 하니 이렇게 되네요

sqlplus 접속도 안되네요