jdbc:oracle:thin:@(DESCRIPTION =
  (ADDRESS_LIST =
    (ADDRESS =
      (PROTOCOL = TCP)
      (HOST = site1)
      (PORT = 1521)
    )
    (ADDRESS =
      (PROTOCOL = TCP)
      (HOST = site2)
      (PORT = 1521)
    )
  )
  (FAILOVER=ON)
  (FAILOVER_MODE=
    (TYPE=SELECT)
    (METHOD=BASIC)
    (RETRIES=20)
    (DELAY=3)
  )
  (LOAD_BALANCE = OFF)
  (CONNECT_DATA =
    (SERVER = DEDICATED)
    (SERVICE_NAME = MYDB)
  )
)

java.util.concurrent.ExecutionException:
  java.lang.RuntimeException:
    java.sql.SQLException:
      ORA-01033: ORACLE initialization or shutdown in progress