- the proxy service was not registered
- the proxy service was registered, but was blocking new connections
- all of the registered proxy service handlers were blocking new connections
1. The user is running a version of LSNRCTL that is lower than the version of the listener.
2. The user is attempting to administer the listener from a remote node.
3. The listener could not obtain the system resources needed to perform the authentication.
4. The local network connection between the listener and LSNRCTL was terminated unexpectedly during authentication message exchange, such as if LSNRCTL program was suddenly aborted.
5. The communication between the listener and LSNRCTL is being intercepted by a malicious user.
6. The software that the user is running is not following the authentication protocol, indicating a malicious user.
2. Turn on logging or tracing to get more information about this error.
3. Correct any parameter errors (or mismatched paranthesis), and retry starting Oracle Connection Manager.
4. If the problem persists, contact Oracle Support Services.
- If you are using local naming (TNSNAMES.ORA file):
- Make sure that "TNSNAMES" is listed as one of the values of the NAMES.DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.ORA)
- 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.
- 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.
- If you are using local naming (TNSNAMES.ORA file):
- Make sure that "TNSNAMES" is listed as one of the values of the NAMES.DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.ORA)
- 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.
- 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.
- Configure DEFAULT_SERVICE parameter in LISTENER.ORA with a valid service name. Reload the listener parameter file using reload [<listener_name>]. This should be done by the LISTENER administrator.
- If using a service name, Check that the connect descriptor corresponding to the service name in TNSNAMES.ORA has a SERVICE_NAME or SID component in the CONNECT_DATA.
- Wait a moment and try to connect a second time.
- Check which instances are currently known by the listener by executing: lsnrctl services <listener name>
- Check that the SID parameter in the connect descriptor specifies an instance known by the listener.
- Check for an event in the listener.log file.
- Wait a moment and try to connect a second time.
- Check which services are currently known by the listener by executing: lsnrctl services <listener name>
- Check that the SERVICE_NAME parameter in the connect descriptor of the net service name used specifies a service known by the listener.
- If an easy connect naming connect identifier was used, check that the service name specified is a service known by the listener.
- Check for an event in the listener.log file.
- Wait a moment and try to connect a second time.
- Check which instances are currently known by the listener by executing: lsnrctl services <listener name>
- Check that the INSTANCE_NAME parameter in the connect descriptor specifies an instance name known by the listener.
- Check for an event in the listener.log file.
1. The other process was terminated.
2. The machine on which the other process is running went down.
3. Some other communications error occurred.
1. The other process was terminated.
2. The machine on which the other process is running went down.
3. Some other communications error occurred.
1. Change the entry in sqlnet.ora that determines which services are to be used.
2. Relink the client with at least one of the authentication service adapters that the server supports.
3. Relink the server with at least one of the authentication service adapters that the client supports.
4. Disable authentication on both the client and server.
- The user might not have permission to make up his own pincode.
- The pincode was either too short or too long. Valid pincodes consist of minimal four, but no more than eight characters.
- The pincode contains any non alphanumeric characters.