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linux - oracle lsnrctl TNS-12545: Connect failed because target host or object does not exist



I am trying to connect to my oracle database. I can't get the listener started. Here is what I have tried.





$ lsnrctl start





LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 20-JAN-2012 08:19:58

Copyright (c) 1991, 2007, Oracle. All rights reserved.


Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Error listening on: (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
TNS-12545: Connect failed because target host or object does not exist
TNS-12560: TNS:protocol adapter error
TNS-00515: Connect failed because target host or object does not exist




$ cat ./admin/tnsnames.ora




 
# TNSNAMES.ORA Network Configuration File:
# /u01/app/oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
#

EXTPROC_CONNECTION_DATA.test =

(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(CONNECT_DATA =
(SID = DEVDB)
(PRESENTATION = RO)
)
)


DEVDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = DEVDB.test)
)
)


DEBDB.test =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = DEVDB.test)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = DEVDB.test)
)
)




$ hostname
test




Here is an example of a successful start on an other machine with similar set up. No listner.ora file just tnsnames.ora.




$ lsnrctl start


LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 20-JAN-2012 11:38:51

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracletest)(PORT=1521)))


Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date 20-JAN-2012 11:38:51
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF

Listener Log File /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracletest)(PORT=1521)))
The listener supports no services
The command completed successfully

Answer



You have empty HOST= in your listener.ora. I would edit it to be HOST=my.ip.address. Even HOST=127.0.0.1 will do if the application is on the same host. Did you run netca properly earlier (which is recommended for beginners)?


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