ADF Calendar throws Invalid Year Value randomly

Hi,
I am creating  Webcenter Portal Application using Jdev 11.1.1.6
I am building a Adf Calender generated scheduling process to perform certain actions.

During this process ,Adf calender randomly throws 'Invalid Year Value' error

error that I am getting :


ADF: Adding the following JSF error message: Invalid year value java.lang.IllegalArgumentException: Invalid year value at oracle.sql.DATE.toBytes(DATE.java:545) at oracle.sql.DATE.<init>(DATE.java:95) at oracle.jbo.domain.Date.<init>(Date.java:330) at oracle.jbo.domain.Date$5.convert(Date.java:201) at oracle.jbo.domain.TypeFactory.get(TypeFactory.java:855) at oracle.jbo.domain.TypeFactory.get(TypeFactory.java:559) at oracle.jbo.domain.TypeFactory.getInstance(TypeFactory.java:336) at oracle.adf.model.binding.DCMethodParameterDef.resolveParameterValue(DCMethodParameterDef.java:225) at oracle.adf.model.binding.DCMethodParameter.resolveParameterValue(DCMethodParameter.java:57) at oracle.adf.model.binding.DCInvokeMethod.fetchAndSaveParameterValues(DCInvokeMethod.java:325) at oracle.adf.model.binding.DCInvokeMethod.fetchParameterValues(DCInvokeMethod.java:303) at oracle.jbo.uicli.binding.JUCtrlActionBinding.doIt(JUCtrlActionBinding.java:1536) at oracle.adf.model.binding.DCDataControl.invokeOperation(DCDataControl.java:2149) at oracle.jbo.uicli.binding.JUCtrlActionBinding.invoke(JUCtrlActionBinding.java:740) at oracle.adf.controller.v2.lifecycle.PageLifecycleImpl.executeEvent(PageLifecycleImpl.java:402) at oracle.adfinternal.view.faces.model.binding.FacesCtrlActionBinding._execute(FacesCtrlActionBinding.java:252) at oracle.adfinternal.view.faces.model.binding.FacesCtrlActionBinding.execute(FacesCtrlActionBinding.java:210) at oracle.adfinternal.view.faces.model.binding.FacesCtrlCalendarBinding.executeCalendarActionBinding(FacesCtrlCalendarBinding.java:344) at oracle.adfinternal.view.faces.model.binding.FacesCtrlCalendarBinding$AdfmCalendarModel._getIdToActivitiesMap(FacesCtrlCalendarBinding.java:839) at oracle.adfinternal.view.faces.model.binding.FacesCtrlCalendarBinding$AdfmCalendarModel.getActivity(FacesCtrlCalendarBinding.java:550) at oracle.adfinternal.view.faces.renderkit.rich.CalendarRenderer._decodeCalendarActivityEvent(CalendarRenderer.java:873) at oracle.adfinternal.view.faces.renderkit.rich.CalendarRenderer.decodeInternal(CalendarRenderer.java:100) at oracle.adf.view.rich.render.RichRenderer.decode(RichRenderer.java:293) at org.apache.myfaces.trinidad.component.UIXComponentBase.__rendererDecode(UIXComponentBase.java:1118) at org.apache.myfaces.trinidad.component.UIXComponentBase.decode(UIXComponentBase.java:717) at org.apache.myfaces.trinidad.component.UIXComponentBase.processDecodes(UIXComponentBase.java:800) at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl$ApplyRequestValuesCallback.invokeContextCallback(LifecycleImpl.java:1278) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1410) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424) at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)