| ORA-12541 | : |
TNS:no listener |
| Cause | : |
he connection request could not be completed because the listener is not
running.
of connect identifier used was a net service name then the net service name could
not be found in a naming method repository, or the repository could not be located
or reached. |
| Action | : |
Ensure that the supplied destination address matches one of the
addresses used by the listener - compare the TNSNAMES.ORA entry with the
appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is to go by
way of an Interchange). Start the listener on the remote machine.
- Verify that a TNSNAMES.ORA file exists and is in the proper directory and is
accessible.
- Check that the net service name used as the connect identifier exists in the
TNSNAMES.ORA file.
- Make sure there are no syntax errors anywhere in the TNSNAMES.ORA file.
Look for unmatched parentheses or stray characters. Errors in a TNSNAMES.ORA
file may make it unusable.
9-2 Oracle Database Error Messages
- If you are using directory naming:
- Verify that "LDAP" is listed as one of the values of the NAMES.DIRETORY_
PATH parameter in the Oracle Net profile (SQLNET.ORA).
- Verify that the LDAP directory server is up and that it is accessible.
- Verify that the net service name or database name used as the connect identifier
is configured in the directory.
- Verify that the default context being used is correct by specifying a fully qualified
net service name or a full LDAP DN as the connect identifier
- If you are using easy connect naming:
- Verify that "EZCONNECT" is listed as one of the values of the
NAMES.DIRETORY_PATH parameter in the Oracle Net profile (SQLNET.ORA).
- Make sure the host, port and service name specified are correct.
- Try enclosing the connect identifier in quote marks. See the Oracle Net Services
Administrators Guide or the Oracle operating system specific guide for more
information on naming. |
More Information |
1. Check your tnsname using "tnsping" command on client side:
tnsping "your oracle service"
2. Check database listener (server side) if the specific service or SID is on
lsnrctl status |
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