SQLNET.ALLOWED_LOGON_VERSION = 10 参数引起的ORA-28040故障一则:
环境:
Database:Oracle 11gR2 (11.2.0.3)
Applicate:tomcate+apache
connect type:jdbc6-11.2.0.1.jar
现象:
用jdbc来连接我的Oracle 11gR2集群,报如下错误,而通过sqlplus,pl/sql,isqlplus,odbc等工具访问没有任何问题:
error:
ORA-28040: No matching authentication protocol
链接字符串写法:
xxx_driver=oracle.jdbc.driver.OracleDriver
xxx_dburl=jdbc:oracle:thin:@(DESCRIPTION = (ADDRESS_LIST =(LOAD_BALANCE =yes)(ADDRESS = (PROTOCOL = TCP)(HOST = db.prudentwoo.com)(PORT = 1521)))(CONNECT_DATA = (SERVICE_NAME = TAF)(failover_mode=(type=select)(method=basic))))
xxx_dbuser=prudent
xxx_dbpwd=woo
oerr给出的解决办法:
Error: ORA-28040 (ORA-28040)
Text: No matching authentication protocol
---------------------------------------------------------------------------
Cause: No acceptible authentication protocol for both client and server
Action: Administrator should set SQLNET_ALLOWED_LOGON_VERSION parameter
on both client and servers to values that matches the minimum
version supported in the system.
Metalink给出的解决办法:
1、这是JDBC的一个bug,应用JDBC Driver Patch (6779501)
2、或者尝试将 SQLNET.ALLOWED_LOGON_VERSION值改为9或8
3、
问题分析:
该参数是用来设定数据库采取的方式所设定的一个参数,从错误信息来看"没有匹配的身份认证协议",后来我采取更换其它协议值,结果还是发生同样的问题,无法连接。
问题排错:
这个时候我采用的是排他法来测试,基本上每个认证的协议数字都用了一遍,还是不行,所幸把这行参数给删了,JDBC就能链接上数据库了。
文档参考:
http://docs.oracle.com/cd/B28359_01/network.111/b28317/sqlnet.htm#BIIEAFHAhttp://space.itpub.net/20674423/viewspace-776433/http://space.itpub.net/20674423/viewspace-776432/