websphere与mysql连接的示例分析

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我是 jb9+websphere，想用 JNDI 访问 mysql
在 http://localhost:9090/admin 我配置如下
在 jdbc 提供程序里设置
类路径:D:mysqldrivermysql-connector-java-3.0.11-stable-bin.jar
实现类名为：com.mysql.jdbc.Driver
然后在数据源设置：
名称:DataSource
JNDI:jdbc/DataSource
最后在定制属性增加（这地方我删增了好多次，就是没效果）：
databaseName–info
user-root
password–blue
url–jdbc:mysql://localhost/info
portNumber–3306
ConnectionURL–jdbc:mysql://localhost/info
使用连接代码如下
private final static String JNDI= jdbc/DataSource
InitialContext ctx=new InitialContext();
DataSource source=(DataSource)ctx.lookup(JNDI);
conn = source.getConnection();
结果 source 不为空，但是 conn 出现错误如下：
我不知道哪里错了，从昨天一直调到今天，websphere 控制台打印功能又非常弱 (system.out 看不到出错信息，真是郁闷！）
实在不知道该怎么处理，恳请大虾指导一下，非常感谢！
java.sql.SQLException: DSRA9002E: ResourceException 带有错误代码 null：
javax.resource.spi.ResourceAllocationException:
Caught ResourceException thrown during creation of the ManagedConnection.
at com.ibm.ejs.j2c.poolmanager.FreePool.createManagedConnectionWithMCWrapper(FreePool.java:1151)
at com.ibm.ejs.j2c.poolmanager.FreePool.createOrWaitForConnection(FreePool.java:908)
at com.ibm.ejs.j2c.poolmanager.PoolManager.reserve(PoolManager.java:1067)
at com.ibm.ejs.j2c.ConnectionManager.allocateMCWrapper(ConnectionManager.java:568)
at com.ibm.ejs.j2c.ConnectionManager.allocateConnection(ConnectionManager.java:378)
at com.ibm.ws.rsadapter.jdbc.WSJdbcDataSource.getConnection(WSJdbcDataSource.java:205)
at com.ibm.ws.rsadapter.jdbc.WSJdbcDataSource.getConnection(WSJdbcDataSource.java:180)
at testwebsphere.web.DataBaseFacade.getUserinfo(DataBaseFacade.java:22)
at org.apache.jsp._index._jspService(_index.java:112)
at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java:89)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:344)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java:598)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.service(JspServlet.java:696)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:258)
at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:872)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:491)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:173)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:79)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:199)
at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:182)
at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:331)
at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:432)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:343)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:592)[@more@]