oracle.apps.fnd.framework.OAException

Following errors came up after bouncing Apache before logging in:

oracle.apps.fnd.framework.OAException: Application: FND, Message Name: FND_NO_REGION_DATA. Tokens: REGIONCODE = /oracle/apps/fnd/framework/navigate/webui/HomePG;
at oracle.apps.fnd.framework.webui.JRAD2AKMapper.getRootMElement(JRAD2AKMapper.java:529)
at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getWebBeanTypeDataFromJRAD(OAWebBeanFactoryImpl.java:3719)
at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getRootApplicationModuleClass(OAWebBeanFactoryImpl.java:3452)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1006)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:509)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:430)
at _oa__html._OA._jspService(_OA.java:84)
at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
at oracle.jsp.JspServlet.service(JspServlet.java:156)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
at org.apache.jserv.JServConnection.run(JServConnection.java:294)
at java.lang.Thread.run(Thread.java:619)
## Detail 0 ##

Exception:
oracle.adf.mds.MetadataDefException: Unable to find component with absolute reference = /oracle/apps/fnd/framework/navigate/webui/HomePG, XML Path = null. Please verify that the reference is valid and the definition of the component exists either on the File System or in the MDS Repository.
at oracle.adf.mds.internal.MetadataManagerBase.findElement(MetadataManagerBase.java:1350)
at oracle.adf.mds.MElement.findElement(MElement.java:97)
at oracle.apps.fnd.framework.webui.JRAD2AKMapper.getRootMElement(JRAD2AKMapper.java:503)
at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getWebBeanTypeDataFromJRAD(OAWebBeanFactoryImpl.java:3719)
at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getRootApplicationModuleClass(OAWebBeanFactoryImpl.java:3452)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1006)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:509)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:430)
at _oa__html._OA._jspService(_OA.java:84)
at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
at oracle.jsp.JspServlet.service(JspServlet.java:156)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
at org.apache.jserv.JServConnection.run(JServConnection.java:294)
at java.lang.Thread.run(Thread.java:619)


Exception:
oracle.adf.mds.MetadataDefException: Unable to find component with absolute reference = /oracle/apps/fnd/framework/navigate/webui/HomePG, XML Path = null. Please verify that the reference is valid and the definition of the component exists either on the File System or in the MDS Repository.
at oracle.adf.mds.internal.MetadataManagerBase.findElement(MetadataManagerBase.java:1350)
at oracle.adf.mds.MElement.findElement(MElement.java:97)
at oracle.apps.fnd.framework.webui.JRAD2AKMapper.getRootMElement(JRAD2AKMapper.java:503)
at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getWebBeanTypeDataFromJRAD(OAWebBeanFactoryImpl.java:3719)
at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getRootApplicationModuleClass(OAWebBeanFactoryImpl.java:3452)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1006)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:509)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:430)
at _oa__html._OA._jspService(_OA.java:84)
at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
at oracle.jsp.JspServlet.service(JspServlet.java:156)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
at org.apache.jserv.JServConnection.run(JServConnection.java:294)
at java.lang.Thread.run(Thread.java:619)

Solution:
Login as applmgr on your unix box which hosts the web tier.
cd $APPLCSF/scripts/$CONTEXT_NAME
adapcctl.sh stop
rm -rf $COMMON_TOP/_pages
adapcctl.sh start