TNS listener error "ORA-12514: TNS:listener..."

Question

Hi all,
I have a problem with my listener on Oracle 11.2.0.2.
I am more of a developer than a DBA, and I do not have a DBA to consult, so I hope you can address me, please.
I have 2 DB instances running on the same machine ORCL and ORCL2 on port 1521, both using the same listener "LISTENER" as well on port 1521.
In my TNSnames I had to add yesterday as well a new entry to a DB (ORCL3) hosted on a different machine.
Since then, I can connect to ORCL and ORCL3 without problem via sqlplus, but I get the below error when I connect to ORCL2:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
I think the answer is to have to separate listeners for ORCL and ORCL2, but I have had several failed attempts.
Can you please advise on what I need to do? I have looked at various sites, but if you are not too experienced with listeners, they are not really very clear.
Thanks

Answer 1

Hi, thanks.
ORANAMES:
# tnsnames.ora Network Configuration File: C:\oracle\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
LISTENER_ORCL =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ORCL2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl2)
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl.xxx.xxx.net)
ORCL3 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 1.2.3.4)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl.2.3.4)
STATUS:
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Production
Start Date 28-JAN-2012 10:14:06
Uptime 0 days 2 hr. 19 min. 26 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File C:\oracle\product\11.2.0\dbhome_1\network\admin\listener.ora
Listener Log File C:\oracle\diag\tnslsnr\xxx\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl.xxx.xxx.net" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB.xxx.xxx.net" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully