Lsnrctl start newlist, TNS-12560: TNS:protocol adapter error

Question

Hello I am using Windows 7. Oracle 11g R2. Firstly I created my directory C:\oracle\net. Then I created an entry for TNSADMIN in the windows registry entering the newly created c:\oracle\net.
I ran Oracle Net Manager. The path C:\oracle\net is displayed in the title bar.
Using Oracle Net Manager I created my listener with the following settings as saved to listener.ora in the C:\oracle\net directory
# listener.ora Network Configuration File: C:\oracle\net\listener.ora
# Generated by Oracle configuration tools.
ADR_BASE_NEWLIST = C:\app\oracle\product\11.2.0\dbhome_2\log
NEWLIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 2521))
From the command line prompt I type ......
lsnrctl start newlist
The following is returned
starting tnslnsr: please wait...
followed by
TNS-12560: TNS:protocol adapter error
TNS-00530: TNS:protocol adapter error
??? How do I resolve this? thanks

Answer 1

The above scenario is part of a learning exercise (ex6.1) from the chapter on configuring the Oracle Net Environment OCA Oracle Database 11g Administration I Exam Guide by John Watson from the Oracle Press series.
127.0.0.1 is the loopback address of (all) local machines.
This step is step 16 of the learning exercise. Until I resolve it I cannot complete the remaining steps!
The steps of the exercise are as below..........................
Configure Oracle Net
In this exercise, you will set up a complete Oracle Net environment, using graphical
and command-line tools. Where there are differences between Windows and Linux,
these will be pointed out.
1. Create a directory to be used for the Oracle Net configuration files, and set
the TNS_ADMIN variable to point to this. It doesn’t matter where the direc-
tory is, as long as the Oracle user has permission to create, read, and write it.
On Linux:
mkdir /u01/oracle/net
export TNS_ADMIN=/u01/oracle/net
Ensure that all work from now is done from a session where the variable has
been set.
On Windows:
mkdir d:\oracle\net
Create and set the key TNS_ADMIN as a string variable in the registry in
the Oracle Home branch. This will typically be
HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\KEY_OraDb1g_home1
2. Check that the variable is being read by using the TNSPING command from
an operating system prompt:
tnsping orcl
This will return an error “TNS-03505: Failed to resolve name” because there
are no files in the TNS_ADMIN directory. On Windows, you may need to
launch a new command prompt to pick up the new TNS_ADMIN value from
the registry.
3. Start the Net Manager. On Linux, run netmgr from an operating system
prompt; on Windows, launch it from the Start menu. The top line of the Net
Manager window will show the location of the Oracle Net files. If this is not
the new directory, then the TNS_ADMIN variable has not been set correctly.
4. Create a new listener: expand the Local branch of the navigation tree,
highlight Listeners, and click the +.
5. Enter a listener name, NEWLIST, and click OK.
6. Click Add Address.
7. For Address 1, choose TCP/IP as the protocol and enter 127.0.0.1 as the
host, 2521 as the port. The illustration that follows shows the result.
8. Create a new service name: highlight Service Naming in the navigation tree,
and click the +.
9. Enter NEW as the net service name, and click Next.
10. Select TCP/IP as the protocol, and click Next.
11. Enter 127.0.0.1 as the host name and 2521 as the port and click Next.
12. Enter SERV1 as the Service Name, and click Next.
13. Click Finish. If you try the test, it will fail at this time. The illustration that
follows shows the result.
14. Save the configuration by clicking File and Save Network Configuration.
This will create the listener.ora and tnsnames.ora files in the
TNS_ADMIN directory.
15. Use an editor to check the two files. They will look like this:
LISTENER.ORA:
NEWLIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 2521))
TNSNAMES.ora:
NEW =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT =
2521))
(CONNECT_DATA =
(SERVICE_NAME = SERV1)
16. From an operating system prompt, start the listener with lsnrctl start
newlist.
17. From an operating system prompt, test the connect string with tnsping new.
000
18. Connect to your database using operating system authentication, bypassing
any listener, with sqlplus / as sysdba.
19. Set the service_names and local_listener parameters for the running
instance (memory only, not the parameter file) and register the new service
name with the new listener:
alter system set service_names=serv1 scope=memory;
alter system set local_listener=new scope=memory;
alter system register;
20. From an operating system prompt, confirm that the new service has registered
with the new listener with lsnrctl services newlist.
21. Confirm that the new network environment is functional by logging on:
sqlplus system/oracle@new