准备在表SystemEvents上执行时出现异常：oracle webcenter安装问题

我正在尝试在Windows Server 2008 R2中安装oracle web center。 但我在sites.log中遇到此异常，安装失败

这是我的堆栈跟踪。 感谢您的任何帮助

[2013-12-20 03:27:12,141 PST] [ERROR] [pool-7-thread-1] [fatwire.logging.cs.db] Exception in prepared execute on table SystemEvents: SELECT eventname,type,enabled,times,target,params FROM SystemEvents
java.lang.NullPointerException
at COM.FutureTense.Servlet.JDBCTable.prepare(JDBCTable.java:1767)
at COM.FutureTense.Servlet.JDBCTable.executeQuery_trans_logic(JDBCTable.java:1628)
at COM.FutureTense.Servlet.JDBCTable.executeQuery_trans(JDBCTable.java:1590)
at COM.FutureTense.Servlet.JDBCTable.executeQuery(JDBCTable.java:1430)
at COM.FutureTense.Servlet.JDBCTable.SelectRow(JDBCTable.java:1025)
at COM.FutureTense.Common.ftDBTable.selectTo(ftDBTable.java:2229)
at COM.FutureTense.Event.ftEvent.getEventsList(ftEvent.java:309)
at COM.FutureTense.Platform.SystemEvents.SystemEventFactoryImpl.getSystemEvents(SystemEventFactoryImpl.java:62)
at COM.FutureTense.Platform.SystemEvents.HeartBeat.run(HeartBeat.java:43)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662) less…
java.lang.nullpointerexception

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我创建的用户需要一些特定的角色和系统权限

角色：连接、CSW_USR_角色、资源、WFS_USR_角色

系统权限：创建会话、创建表、创建视图、无限表空间

我给了一些不必要的角色和特权，因此出现了错误