Configuring additional listener

Question

Hi,
Can anyone tell me how to configure additional listener for a database, so when the first one is down the other takes its job?
I`ve added new listener using Net Manager. I`ve also modified tnsnames.ora to include new listener address.
I shut down the first listener, and tried to connect to database using sqlplus:
sqlplus system@orcl
but I keep getting ORA-12514 error. I`ve checked services registered in the second listener and I can see my database there.
Any ideas what else should be configured to make this work?
My listener.ora looks like this:
LISTENER2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Piko_laptop)(PORT = 1561))
LOGGING_LISTENER2 = OFF
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Piko_laptop)(PORT = 1521))
and tnsnames:
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = Piko_laptop)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = Piko_laptop)(PORT = 1561))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)

Answer 1

Piko wrote:
Can anyone tell me how to configure additional listener for a database, so when the first one is down the other takes its job? Not a good and robust approach at all - for the reasons stated by sb92075 above.
Listeners do not crash. If it does on your platform, this is a symptom of an underlying and severe problem. It would be just plain silly to ignore it and think that creating another Listener will address it.
As an example.. Oracle Real Application Clusters (RAC) is a high availability environment. How many listeners by default runs on a single RAC server node? One!
So if a sophisticated high availability RAC environment only needs a single listener per server.. why on earth do you need two? What is the actual problem you are trying to solve?