数据库升级为Oracle 10g RAC,原有的连接方式下,出现如下错误:
出错信息:
- Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: “o
rg.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFacto
ry (Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=169869568)(ERR=12505)(
ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4)))))”
at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnect
ion(QueryTagSupport.java:276)
at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag
(QueryTagSupport.java:159)
于是根据网上的资料修改了JDBC的URL,正确jdbc的url为:
jdbc:oracle:thin:@(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.40.103)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.40.104)(PORT = 1521))
(LOAD_BALANCE = yes)
(CONNECT_DATA = (SERVER = DEDICATED)
(SERVICE_NAME = mydb.618119.com) ) )
或者:
jdbc:oracle:thin:@(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)
(HOST = db01.618119.com)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)
(HOST = db02.618119.com)(PORT = 1521))
(LOAD_BALANCE = yes)
(failover = yes)
(CONNECT_DATA = (SERVER = DEDICATED)
(SERVICE_NAME = mydb.618119.com) ) )
结果过依然存在问题:
偶尔会出现错误:
An error occurred while establishing the connection:
Type: java.sql.SQLException Error Code: 17002
Message:
Io 异常: Connection refused(DESCRIPTION=(ERR=1153)(VSNNUM=169869568)(ERROR_STACK=(ERROR=(CODE=1153)(EMFI=4)(ARGS=’(ADDRESS=(PROTOCOL=TCP)(HOST=RAC02)(PORT=1521))’))(ERROR=(CODE=305)(EMFI=1))))
试了将驱动替换为10g的ojdbc14.jar.
然后再在DbVisualizer中试了很多次断开连接和重新链接,都还没出错.
但是在web页面中测试,还是经常出现获取不到数据库连接的情况.
在网上查询了很多资料,仍未能解决这个问题, 不得已,只好换成oci方式连接.
在jdbc客户端所在地服务器中,将TNSNAMES.ORA里本地服务名配置为
mydb =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.40.103)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.40.104)(PORT = 1521))
(LOAD_BALANCE = yes)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = mydb.618119.com)
)
)
oci方式的jdbc url=”jdbc:oracle:oci:@mydb”;
获取数据库连接正常.
0.229.9.5_ODS1 =
(description =
(enable = broken)
(address = (protocol = tcp)(host = 10.229.9.5)(port = 1521))
(connect_data =
(service_name = ods)
(instance_name = ods1)
(failover_mode =
(backup = ods2)
(TYPE = session)
(METHOD = basic)
(RETRIES = 400)
(DELAY = 10)
)
)
)