WAS集群系列（2）：数据库连接低级错误——网络连接问题

环境

项目点	指标
WAS版本号	7.0
应用server操作系统	Windows 2008
应用server系统位数	64bit
数据库server操作系统	CentOS 5.6
数据库版本号	Oracle 11.0.2.1

今天搭建WAS集群后，公布应用程序包及启动均成功，但在測试数据库连接时提示。不成功，建议查看KVM日志。

于是到日志路径下查看相关日志（此处參考为D:\IBM\WebSphere\AppServer\profiles\AppSrv01\logs\server1\SystemOut.log），信息例如以下：

[14-9-3 16:34:08:609 CST] 0000001d DataSourceCon E   DSRA8040I: 无法连接到 DataSource。遇到 ""：java.sql.SQLException: The Network Adapter could not establish the connectionDSRA0010E: SQL 状态：61000，错误码：20。
	at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:412)
	at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
	at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
	at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
	at oracle.jdbc.pool.OracleDataSource.getPhysicalConnection(OracleDataSource.java:280)
	at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:207)
	at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPhysicalConnection(OracleConnectionPoolDataSource.java:139)
	at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPooledConnection(OracleConnectionPoolDataSource.java:88)
	at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPooledConnection(OracleConnectionPoolDataSource.java:70)
	at com.ibm.ws.rsadapter.DSConfigurationHelper$2.run(DSConfigurationHelper.java:1704)
	at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:5263)
	at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5441)
	at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255)
	at com.ibm.ws.rsadapter.DSConfigurationHelper$3.run(DSConfigurationHelper.java:1720)
	at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118)
	at com.ibm.ws.rsadapter.DSConfigurationHelper.getPooledConnection(DSConfigurationHelper.java:1732)
	at com.ibm.ws.rsadapter.DSConfigurationHelper.getPooledConnection(DSConfigurationHelper.java:1627)
	at com.ibm.ws.rsadapter.DSConfigurationHelper.getConnectionFromDSOrPooledDS(DSConfigurationHelper.java:3370)
	at com.ibm.ws.rsadapter.DSConfigurationHelper.getConnectionFromDSOrPooledDS(DSConfigurationHelper.java:3245)
	at com.ibm.ws.rsadapter.DSConfigurationHelper.testConnectionForGUI(DSConfigurationHelper.java:4105)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:600)
	at com.ibm.ws.management.DataSourceConfigHelperMBean.testConnectionToDataSource2(DataSourceConfigHelperMBean.java:556)
	at com.ibm.ws.management.DataSourceConfigHelperMBean.testConnection(DataSourceConfigHelperMBean.java:484)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:600)
	at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:37)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:600)
	at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:244)
	at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1074)
	at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:955)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServer