一个空格导致的ORA-12516错误

系统报如下错误：Timestamp: 1/17/2012 4:36:24 PMMessage: PROV_OUTPUT_10: Error occurred while polling for new messages. Q

系统报如下错误：Timestamp: 1/17/2012 4:36:24 PM
Message: PROV_OUTPUT_10: Error occurred while polling for new messages. QUEUEDATA schema may be inaccessible.
Waiting 60 seconds before retrying. --> ORA-12516: TNS:listener could not find available handler with matching protocol stack
Category: Exception
下面是检查步骤：

C:\Documents and Settings\ibsadmin>tnsping orcl

TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 18-JAN-2012 10:59:31

Copyright (c) 1997, 2010, Oracle. All rights reserved.

Used parameter files:
F:\app\ibsadmin\product\11.2.0\dbhome\network\admin\sqlnet.ora

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = irdeto-IBSvm)(PORT = 1521))) (CONNECT_DATA = (S
ERVICE_NAME = baseline)))
OK (50 msec)

C:\Documents and Settings\ibsadmin>sqlplus queuedata/queuedata@orcl

SQL*Plus: Release 11.2.0.1.0 Production on Wed Jan 18 10:59:40 2012

Copyright (c) 1982, 2010, Oracle. All rights reserved.

ERROR:
ORA-12516: TNS:listener could not find available handler with matching protocol
stack

Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied

Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\ibsadmin>
C:\Documents and Settings\ibsadmin>lsnrctl

LSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on 18-JAN-2012 11:00:33

Copyright (c) 1991, 2010, Oracle. All rights reserved.

Welcome to LSNRCTL, type "help" for information.

LSNRCTL> status
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Production
Start Date 13-JAN-2012 11:15:44
Uptime 4 days 23 hr. 44 min. 53 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File D:\app\ibsadmin\product\11.2.0\dbhome_1\network\admin\listener.ora
Listener Log File d:\app\ibsadmin\diag\tnslsnr\irdeto-IBSvm\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.86.7.18)(PORT=1521)))
Services Summary...
Service "ORCL" has 1 instance(s).
Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service...
Service "baseline" has 1 instance(s).
Instance "baseline", status READY, has 1 handler(s) for this service...
Service "baselineXDB" has 1 instance(s).
Instance "baseline", status READY, has 1 handler(s) for this service...
The command completed successfully
LSNRCTL>
LSNRCTL>
LSNRCTL> exit

C:\Documents and Settings\ibsadmin>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Wed Jan 18 11:01:25 2012

Copyright (c) 1982, 2010, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> show parameter service

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string baseline
SQL> show parameter listener

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
listener_networks string
local_listener string
remote_listener string
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

F:\app\ibsadmin\product\11.2.0\dbhome\NETWORK\ADMIN>notepad tnsnames.ora

ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = irdeto-IBSvm)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME =baseline) ---去掉baseline和等号之间的空格保存。
)
)

F:\app\ibsadmin\product\11.2.0\dbhome\NETWORK\ADMIN>sqlplus queuedata/queuedata@orcl

SQL*Plus: Release 11.2.0.1.0 Production on Wed Jan 18 11:03:52 2012

Copyright (c) 1982, 2010, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>

，