主库alert.log如下:

Tue Nov  4 15:44:46 2008
Errors in file /u01/app/oracle/admin/logstat1/bdump/logstat1_arc0_6272.trc:
ORA-12505: TNS:listener does not currently know of SID given in connect descriptor
PING[ARC0]: Heartbeat failed to connect to standby 'test2'. Error is 12505.

从库alert.log报错如下:

Tue Nov  4 23:46:08 2008
Errors in file /u01/app/oracle/admin/logstat1/bdump/logstat1_mrp0_16454.trc:
ORA-12505: TNS:listener does not currently know of SID given in connect descriptor

经检查发现主从的监听和TNSNAMES.ORA的配置均正确无误.

tnsping均能正确返回.

但在从库中测试连接报错.

SQL> conn sys/oracle@test2 as sysdba
ERROR:
ORA-12505: TNS:listener does not currently know of SID given in connect
descriptor

Warning: You are no longer connected to ORACLE.
SQL> exit

监听的状态信息:

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

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.10.204)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.10.204)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                05-NOV-2008 00:10:28
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.10.204)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

怀疑是没有正确监听的原因,手动进行注册如下

[oracle@localhost admin]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Nov 5 00:19:51 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> ALTER SYSTEM REGISTER;

System altered.

SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
[oracle@localhost admin]$ sqlplus sys/oracle@test2 as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Nov 5 00:19:59 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

ERROR:
ORA-12505: TNS:listener does not currently know of SID given in connect
descriptor

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

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

仍然没有效果.

最后修改监听器的配置

[oracle@localhost arch]$ vi /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora

# listener.ora Network Configuration File: /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (SID_NAME = logstat1)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
    )

  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.204 )(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
  )

增加红色区域后重启监听,问题解决.

这说明还是动态服务器注册的问题.