OracleRAC客户端连接不稳定的解决方法
http://itpx.eol.cn 来源: 作者:中国IT实验室收集整理 2011-05-30 大 中 小
Oracle RAC安装完毕后,监听、tnsname.ora按照Oracle默认配置好后,在服务器端用sqlplus连接没有问题,但是用客户端连接,会出现有时候连不上的错误,解决方法:
1、修改监听文件,增加SID_LIST_LISTENER,两台机器都要修改,修改完毕后如下:
LISTENER_ORCL1 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.1)(PORT = 1521))
)
)
)
SID_LIST_LISTENER_ORCL1 =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME = /u01/app/oracle/product/11.1.0)
(SID_NAME = ora1)
)
)
2、修改tnsname.ora,两台机器都要修改,例如第一台机器:
用Oracle的netca配置的时候,只配置了一个监听LISTENERS_ORCL,手工增加另外两个监听。
LISTENER_ORCL2 =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))
)
LISTENER_ORCL1 =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.1)(PORT = 1521))
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LISTENERS_ORCL =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.1)(PORT = 1521))
)
ORCL1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.1)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
)
)
ORCL2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
)
)
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))
(LOAD_BALANCE = yes)
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(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ORCL)
)
)
3、修改pfile,将两个本地监听设置上。
可以先导出一份spfile,修改完毕后再导入pfile.增加以下三行:
*.local_listener='LISTENER_ORCL'
ora1.local_listener='LISTENER_ORCL1'
ora2.local_listener='LISTENER_ORCL2'
另外,在启动oralce时,出现ora-32006的错误,数据库倒是起来能用。到网上搜索一通,说是oracle10g以后将*.log_archive_start=TRUE 这个参数去掉了,把这行从spfile中删除了,再启动没有报错。是否真的不需要这个参数,还需要再确认。
4、oracle驱动
经测试发现,在oracle RAC环境下,如果down掉一个实例,应用出现以下错误:
Io 异常: Software caused connection abort: socket write error
org.apache.cocoon.ProcessingException: error on execute servlet:login: javax.servlet.ServletException: error on execute servlet:login
cause: java.sql.SQLException: Io 异常: Software caused connection abort: socket write error
经反复测试,确定原因是oracle的驱动ojdbc14.jar没有放到WEB-INF/lib下的原因。此启动在公共lib下,必须COPY到当前工程下,才能实现fail-over的自动切换。
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