Tnsping OK不代表listener正常

   Tnsping OK不代表listener正常，近日遇到一个问题，环境是11Gr2 RAC，tnsping正常，但是实际访问数据库报错

   
   
   
   

    
    
    
    
ORA-12545: 因目标主机或对象不存在, 连接失败  

   
   
   
   

代码如下

[grid@grida ~]$ srvctl config scan
SCAN name: scan-grid, Network: 1/172.16.200.0/255.255.255.0/eth0
SCAN VIP name: scan1, IP: /scan-grid/172.16.200.219

tnsname file:
XYZ =
 (DESCRIPTION =
   (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.200.219)(PORT = 1521))
   (LOAD_BALANCE = yes)
   (CONNECT_DATA =
     (SERVER = DEDICATED)
     (SERVICE_NAME = XYZ)
   )
 )


scanip:172.16.200.219
C:\Users\B010910>tnsping xyz

TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 07-5月 -
2012 09:02:43

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

已使用的参数文件:
d:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora


已使用 TNSNAMES 适配器来解析别名
尝试连接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.200.219)(PORT
= 1521)) (LOAD_BALANCE = yes) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME
= XYZ)))
OK (60 毫秒)

C:\Users\B010910>sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on 星期一 5月 7 09:03:06 2012

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

SQL> conn system/0racle@xyz;
ERROR:
ORA-12545: 因目标主机或对象不存在, 连接失败

经过分析，tnsping正常只能说明，该IP、1521端口、以及listener status是正常的。但是在实际需要访问instance的时候，并没有能够正常连接，主要问题就是instance并没有正常的注册到listener中，需要进一步分析没有注册的原因。

  查看CRS资源 

[oracle@qr01db01 ~]$ crsctl status res -t
--------------------------------------------------------------------------------
NAME           TARGET  STATE        SERVER                   STATE_DETAILS
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.DATA_QR01.dg
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
ora.DBFS_DG.dg
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
ora.LISTENER.lsnr
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
ora.RECO_QR01.dg
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
ora.asm
               ONLINE  ONLINE       qr01db01                 Started
               ONLINE  ONLINE       qr01db02
ora.gsd
               OFFLINE OFFLINE      qr01db01
               OFFLINE OFFLINE      qr01db02
ora.net1.network
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
ora.ons
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
ora.registry.acfs
               ONLINE  ONLINE       qr01db01
               ONLINE  ONLINE       qr01db02
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.LISTENER_SCAN1.lsnr
      1        ONLINE  ONLINE       qr01db01
ora.cvu
      1        ONLINE  ONLINE       qr01db01
ora.dbm.db
      1        ONLINE  ONLINE       qr01db02                 Open
      2        ONLINE  ONLINE       qr01db01                 Open
ora.oc4j
      1        ONLINE  ONLINE       qr01db01
ora.qr01db01.vip
      1        ONLINE  ONLINE       qr01db01
ora.qr01db02.vip
      1        ONLINE  ONLINE       qr01db02
ora.scan1.vip
      1        ONLINE  ONLINE       qr01db01

查看instance是否正常注册

[oracle@qr01db01 ~]$ ps -ef | grep tns
oracle    3049     1  0 May02 ?        00:00:02 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN1 -inherit
oracle    3057     1  0 May02 ?        00:00:02 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER -inherit
oracle    5677  5606  0 10:33 pts/0    00:00:00 grep tns

[oracle@qr01db01 ~]$ lsnrctl service LISTENER_SCAN1

LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 07-MAY-2012 10:33:27

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

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1)))
Services Summary...
Service "dbm.example.com" has 2 instance(s).     <<<<<<<<<<<<<<<<<这里显示已经将实例注册
  Instance "dbm1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         REMOTE SERVER
         (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.0.2.24)(PORT=1521)))
  Instance "dbm2", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         REMOTE SERVER
         (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.0.2.25)(PORT=1521)))
Service "dbmXDB.example.com" has 2 instance(s).
  Instance "dbm1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "D000" established:0 refused:0 current:0 max:1022 state:ready
         DISPATCHER
         (ADDRESS=(PROTOCOL=tcp)(HOST=qr01db01.example.com)(PORT=61048))
  Instance "dbm2", status READY, has 1 handler(s) for this service...
    Handler(s):
      "D000" established:0 refused:0 current:0 max:1022 state:ready
         DISPATCHER
         (ADDRESS=(PROTOCOL=tcp)(HOST=qr01db02.example.com)(PORT=46543))
The command completed successfully

查看parameter参数 

[oracle@qr01db01 ~]$ sqlplus / as sysdba

SQL> show parameter remote_listener

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
remote_listener                      string      qr01-scan:1521


SQL> show parameter local_listenerNAME                                 TYPE        VALUE------------------------------------ ----------- ------------------------------local_listener                       string      (DESCRIPTION=(ADDRESS_LIST=(AD                                                 DRESS=(PROTOCOL=TCP)(HOST=192.                                                 0.2.24)(PORT=1521))))

参考hosts文件设置 

[oracle@qr01db01 ~]$ cat /etc/hosts
127.0.0.1       localhost.localdomain           localhost

192.0.2.11      qr01cel01.example.com           qr01cel01
192.0.2.12      qr01cel02.example.com           qr01cel02
192.0.2.13      qr01cel03.example.com           qr01cel03
192.0.2.14      qr01db01.example.com            qr01db01
192.0.2.15      qr01db02.example.com            qr01db02

192.0.2.21      qr01-scan.example.com           qr01-scan
192.0.2.24      qr01db01-vip.example.com        qr01db01-vip
192.0.2.25      qr01db02-vip.example.com        qr01db02-vip

192.168.1.11    qr01cel01-priv.example.com      qr01cel01-priv
192.168.1.12    qr01cel02-priv.example.com      qr01cel02-priv
192.168.1.13    qr01cel03-priv.example.com      qr01cel03-priv
192.168.1.14    qr01db01-priv.example.com       qr01db01-priv
192.168.1.15    qr01db02-priv.example.com       qr01db02-priv

 

     以上信息都确认正常，基本就能将listener的问题解决了。