RAC客戶端連接TNS-12547:TNS:丟失連接

在sqlnet.ora文件中將tcp.validnode_checking的值設為no。然后重v剎啟數(shù)據(jù)庫與服務就可以了。

MOS上面解釋
Oracle E-Business Suite Release 11.5.10 introduced support for the Oracle Net security feature, tcp.validnode_checking, which is used to prevent unauthorized Oracle Net access (for example via SQL*Plus) to the Applications database. If a node or PC is not registered, the connection attempt will fail with the error ORA-12537: TNS: connection closed.

第一種方法
第一種
在sqlnet.ora文件中將tcp.validnode_checking的值設為no。然后重v剎啟數(shù)據(jù)庫與服務就可以了。

第二種方法
客戶，在使用pl/sql連接數(shù)據(jù)庫的時候提示ORA-12537：TNS:連接關(guān)閉。
查看過程：
1）查看客戶端tnsname.ora文件信息如下：# tnsnames.ora Network Configuration File: E:\oracle\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
RHYS =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.20.1)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = test)
)
)
沒有問題
2）查看服務器監(jiān)聽狀態(tài)
[oracle@oracle-one ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 01-NOV-2013 11:19:35Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oracle-one)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 01-NOV-2013 11:08:41
Uptime 0 days 0 hr. 10 min. 54 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File /opt/app/oracle/diag/tnslsnr/oracle-one/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle-one)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "test" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
Service "RHYSXDB" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
The command completed successfully
[oracle@oracle-one ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Fri Nov 1 11:19:38 2013Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter service NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string test
SQL>
正常
3）在客戶端使用tnsping：
C:\Users\Administrator>tnsping rhysTNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 01-11月-
2013 11:10:05Copyright (c) 1997, 2010, Oracle. All rights reserved.已使用的參數(shù)文件:
E:\softsetup\oracle_client\oracle_base\network\admin\sqlnet.ora
已使用 TNSNAMES 適配器來解析別名
嘗試連接 (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.1
68.20.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = test)))
TNS-12547: TNS: 丟失連接
C:\Users\Administrator>
4）在服務器查看sqlnet.ora文件內(nèi)容如下：
tcp.validnode_checking=yes
tcp.invited_nodes=(192.168.56.101)
可以看出，正是由于存在tcp.validnode_checking=yes才去檢查tcp.invited_nodes定義的節(jié)點，將客戶端ip地址192.168.56.1加入該文件中即可。
tcp.validnode_checking=yes
tcp.invited_nodes=(192.168.56.101,192.168.56.1)
"sqlnet.ora" 1118L, 32887C written
[oracle@oracle-one admin]$
由于操作的是正在運行的服務器，，因此不能重啟該監(jiān)聽，但是reload可以實現(xiàn)。
[oracle@oracle-one admin]$
lsnrctlLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 01-NOV-2013 11:22:57Copyright (c) 1991, 2013, Oracle.
All rights reserved.Welcome to LSNRCTL, type "help" for information.
LSNRCTL> help
The following operations are available
An asterisk (*) denotes a modifier or extended command:start stop status
services version reload
save_config trace spawn
change_password quit exit
set* show* LSNRCTL> reload
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oracle-one)(PORT=1521)))
The command completed successfully
LSNRCTL> exit
5）在客戶端測試：
C:\Users\Administrator>tnsping rhys
TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 01-11月-
2013 11:23:14Copyright (c) 1997, 2010, Oracle. All rights reserved.已使用的參數(shù)文件:
E:\softsetup\oracle_client\oracle_base\network\admin\sqlnet.ora
已使用 TNSNAMES 適配器來解析別名
嘗試連接 (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.1
68.56.101)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RHYS)))
OK (10 毫秒)C:\Users\Administrator>
問題得到解決

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