Problem with Oracle Net configuration

Question

OK this should be simple but I'm not seeing it.
I have a database listener that runs on port 1530. I think that I have all of the networking files configured correctly and the database configured correctly yet but I'm still getting the following error when attempting to connect to the database with SQL*PLUS:
$ sqlplus system/pwd@infradb
SQL*Plus: Release 10.1.0.5.0 - Production on Tue May 5 10:34:20 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01034: ORACLE not available
ORA-27123: unable to attach to shared memory segment
Linux Error: 22: Invalid argument
Additional information: 1
Additional information: 1638401
Enter user-name:
NOTE: If I don't try to use net services, I can get in no problem:
$ sqlplus system/pwd
SQL*Plus: Release 10.1.0.5.0 - Production on Tue May 5 10:36:21 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.5.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL>
Here are my environment variables:
$ echo $ORACLE_SID
infradb
$ echo $ORACLE_HOME
/u02/app/oracle/product/10gAS_INFRA
listener.ora file contains:
# listener.ora Network Configuration File: /u02/app/oracle/product/10gAS_INFRA/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u02/app/oracle/product/10gAS_INFRA)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = elecidc210g.eia.doe.gov)(PORT = 1530))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
tnsnames.ora file contains:
# tnsnames.ora Network Configuration File: /u02/app/oracle/product/10gAS_INFRA/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
INFRADB.EIA.DOE.GOV =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = elecidc210g.eia.doe.gov)(PORT = 1530))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = infradb.eia.doe.gov)
Inside my database:
SQL> select name from v$database;
NAME
INFRADB
SQL> select instance_name from v$instance;
INSTANCE_NAME
infradb
SQL> select instance from v$thread;
INSTANCE
infradb
SQL> show parameter list
NAME TYPE VALUE
local_listener string (ADDRESS=(PROTOCOL=tcp)(HOST=e
lecidc210g.eia.doe.gov)(PORT=1
530))
remote_listener string
SQL> show parameter service
NAME TYPE VALUE
service_names string infradb.eia.doe.gov
lsnrctl status shows:
oracle@elecidc210g:/u02/app/oracle/product/10gAS_INFRA/network/admin> lsnrctl status
LSNRCTL for Linux: Version 10.1.0.5.0 - Production on 05-MAY-2009 10:33:04
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=elecidc210g.eia.doe.gov)(PORT=1530)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 10.1.0.5.0 - Production
Start Date 05-MAY-2009 10:22:56
Uptime 0 days 0 hr. 10 min. 7 sec
Trace Level off
Security ON: Password or Local OS Authentication
SNMP OFF
Listener Parameter File /u02/app/oracle/product/10gAS_INFRA/network/admin/listener.ora
Listener Log File /u02/app/oracle/product/10gAS_INFRA/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=elecidc210g.eia.doe.gov)(PORT=1530)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "infradb.eia.doe.gov" has 1 instance(s).
Instance "infradb", status READY, has 3 handler(s) for this service...
The command completed successfully
Anyone have any ideas? Could the difference between DB_NAME (select name from v$database) and SID_NAME (select instance from v$thread) be confusing things?

Answer 1

Perhaps I'm missing something, but you you're trying to connect using connect identifier 'infradb', but your tnsnames.ora only has an entry for 'INFRADB.EIA.DOE.GOV', i.e. you've put the service name where you should just have put the connect identifer that you want to use.
To connect 'user/pass@infradb', your tnsnames.ora should be:
INFRADB =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = elecidc210g.eia.doe.gov)(PORT = 1530))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = infradb.eia.doe.gov)
)