出错内容如下，请高手指点一二

01-11-9 上午10:00 : AUDIT [www/Default Server]: SRVE0091I: [小服务程序日志]: "chinalife.Agent: [chinalife.Agent-error]null
java.lang.NullPointerException

at com.ibm.db.DatabaseConnection.(DatabaseConnection.java)

at chinalife.AgentDBBean.initialize(AgentDBBean.java:700)

at chinalife.AgentDBBean.execute(AgentDBBean.java:648)

at chinalife.Agent.performTask(Agent.java:193)

at chinalife.Agent.doPost(Agent.java:112)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java:580)

at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java:160)

at com.ibm.servlet.engine.webapp.IdleServletState.service(StrictLifecycleServlet.java:287)

at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java:105)

at com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:353)

at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java:729)

at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java:655)

at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:338)

at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:175)

at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:93)

at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:77)

at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:67)

at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:106)

at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:160)

at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java:300)

at com.ibm.servlet.engine.oselistener.SQEventListenerImp$ServiceRunnable.run(SQEventListenerImp.java:230)

at com.ibm.servlet.engine.oselistener.SQEventListenerImp.notifySQEvent(SQEventListenerImp.java:104)

at com.ibm.servlet.engine.oselistener.serverqueue.SQEventSource.notifyEvent(SQEventSource.java:212)

at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.notifyService(SQWrapperEventSource.java:347)

at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.run(SQWrapperEventSource.java:216)

at com.ibm.servlet.engine.oselistener.outofproc.OutOfProcThread$CtlRunnable.run(OutOfProcThread.java:248)

at java.lang.Thread.run(Thread.java:481)

"

你使用的是IBM的数据库连接缓冲池；3.0的不能在3.5用（建议不要用IBM的数据库连接缓冲池，从2.0到4.0都不行，而且不向下兼容）

首先java没有指针。。。。。。。。。。。。。
你对一个空值作乐操作，判断是否可以改算现在的算法，或者首先判断这个变量是否为空，然后再作现在的操作。

chinalife.AgentDBBean.initialize方法第700行
看看有没有.操作，然后看看.之前的那个对象有没有可能是空对象