If you are using Oracle RAC as your Waveset repository and you are connecting with the thin driver, use the following URL parameter format in lh setup:
jdbc:oracle:thin:@(DESCRIPTION=(LOAD_BALANCE=OFF) (ADDRESS=(PROTOCOL=TCP)(HOST=host01)(PORT=1521))( ADDRESS=(PROTOCOL=TCP)(HOST=host02)(PORT=1521)) (ADDRESS=(PROTOCOL=TCP)(HOST=host03)(PORT=1521)) (CONNECT_DATA=(SERVICE_NAME=PROD)))