EBS-查看流程图出错

今天下午接到采购系统管理员的电话，说系统无法查看流程图，而之前是OK的。我进入到PO模块，定位到查找采购的FORM。输入编号和发放号点击查询进入到采购订单发运FORM。然后点击查询菜单中的通过工作流查看审评选项。系统跳到ORACLE工作流的状态监控程序WEB页面，在最左下角有个查询流程图的按钮。点击后就报page error的错误。错误如下：

Error Page

Exception Details.

oracle.apps.fnd.framework.OAException: java.lang.NullPointerException at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAHeaderBean.processRequest(OAHeaderBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Inlined Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java(Inlined Compiled Code)) at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java(Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java(Inlined Compiled Code)) at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java(Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at org.apache.jserv.JServConnection.processRequest(JServConnection.java(Compiled Code)) at org.apache.jserv.JServConnection.run(JServConnection.java(Compiled Code)) at java.lang.Thread.run(Thread.java(Compiled Code)) ## Detail 0 ## java.lang.NullPointerException at java.util.Hashtable.get(Hashtable.java(Compiled Code)) at oracle.apps.fnd.util.OracleTimezone.getTimezoneNameFromCode(OracleTimezone.java:171) at oracle.apps.fnd.framework.OANLSServices.getTimezoneName(OANLSServices.java:1635) at oracle.apps.fnd.wf.monitor.webui.GraphMonitorCO.processRequest(GraphMonitorCO.java:107) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAHeaderBean.processRequest(OAHeaderBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Inlined Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java(Inlined Compiled Code)) at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java(Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java(Inlined Compiled Code)) at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java(Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at org.apache.jserv.JServConnection.processRequest(JServConnection.java(Compiled Code)) at org.apache.jserv.JServConnection.run(JServConnection.java(Compiled Code)) at java.lang.Thread.run(Thread.java(Compiled Code)) java.lang.NullPointerException at java.util.Hashtable.get(Hashtable.java(Compiled Code)) at oracle.apps.fnd.util.OracleTimezone.getTimezoneNameFromCode(OracleTimezone.java:171) at oracle.apps.fnd.framework.OANLSServices.getTimezoneName(OANLSServices.java:1635) at oracle.apps.fnd.wf.monitor.webui.GraphMonitorCO.processRequest(GraphMonitorCO.java:107) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAHeaderBean.processRequest(OAHeaderBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java(Inlined Compiled Code)) at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Compiled Code)) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java(Inlined Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java(Inlined Compiled Code)) at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java(Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java(Inlined Compiled Code)) at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java(Compiled Code)) at _oa__html._OA._jspService(_OA.java(Compiled Code)) at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java(Compiled Code)) at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java(Compiled Code)) at oracle.jsp.JspServlet.doDispatch(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.internalService(JspServlet.java(Compiled Code)) at oracle.jsp.JspServlet.service(JspServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at org.apache.jserv.JServConnection.processRequest(JServConnection.java(Compiled Code)) at org.apache.jserv.JServConnection.run(JServConnection.java(Compiled Code)) at java.lang.Thread.run(Thread.java(Compiled Code))

去metalink上一查有个案例跟我们的现象有点类似。

Applies to: Oracle Workflow Cartridge - Version: 11.5.10 to 12.0
This problem can occur on any platform.
Symptoms

After upgrading  to 11.5.10 or R12, going into Workflow Administrator and try to view "Status Diagram"

And receive the following error. 

You have encountered an unexpected error.  Please contact the System Administrator.  Click here for exception details.

Clicking on the link reveals the following error (has been truncated for ease of reading)

oracle.apps.fnd.framework.OAException: java.lang.NullPointerException
--

## Detail 0 ##
java.lang.NullPointerException
 at java.util.Hashtable.get(Hashtable.java:315)
 at oracle.apps.fnd.util.OracleTimezone.getTimezoneNameFromCode(OracleTimezone.java:171)
 at oracle.apps.fnd.framework.OANLSServices.getTimezoneName(OANLSServices.java:1611)
 at oracle.apps.fnd.wf.monitor.webui.GraphMonitorCO.processRequest(GraphMonitorCO.java:107)
 at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:525)

CauseServer Time zone profile option is not set and the Framework is expecting it to be.
Solution

To implement the solution, please execute the following steps:

1. Set the profile option Server Timezone.
2. Bounce the Apache Server.

Note:

You can refer to note 275876.1 for examples of all of the Framework profile options.

References - Oracle Application Framework Profile Options Release 11i (11.5.10)

我测试过我们的英文环境是没任何问题的，难道真的跟时区有关系？试着修改服务器时区参数，重启APACHE，再进入中文环境，竟然OK了。以前为什么没问题呢？虽然问题解决了但心里还是没底。查看metalink文档server timezone这个参数是没有值的（也没默认值），难道它的取值来源于服务器OS的TZ变量？