getting java.util.NoSuchElementException occasionally

Hi All,

I am using MyFaces1.1.5, Tomahawk 1.1.6, ajax4jsf1.1.1 on weblogic 8.1 sp6. Users are sometimes getting NoSuchElementException. Following is the StackTrace of the exception. StackTrace doesn't give any information regarding where in the application is started and hence I am not able to figure out what action might have caused it.
Any help is appreciated.

Thanks in advance,
Nitin

======================================================
java.util.NoSuchElementException
        at java.util.AbstractList$Itr.next(AbstractList.java:426)
        at javax.faces.component._FacetsAndChildrenIterator.next(_FacetsAndChildrenIterator.java:56)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:604)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:605)
        at javax.faces.component.UIForm.processDecodes(UIForm.java:56)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:605)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:605)
        at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:138)
        at org.ajax4jsf.framework.ajax.AjaxViewRoot.access$001(AjaxViewRoot.java:53)
        at org.ajax4jsf.framework.ajax.AjaxViewRoot$1.invokeRoot(AjaxViewRoot.java:256)
        at org.ajax4jsf.framework.ajax.JsfOneOneInvoker.invokeOnRegionOrRoot(JsfOneOneInvoker.java:53)
        at org.ajax4jsf.framework.ajax.AjaxContext.invokeOnRegionOrRoot(AjaxContext.java:191)
        at org.ajax4jsf.framework.ajax.AjaxViewRoot.processDecodes(AjaxViewRoot.java:272)
        at org.apache.myfaces.lifecycle.ApplyRequestValuesExecutor.execute(ApplyRequestValuesExecutor.java:32)
        at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:95)
        at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:70)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:139)
        at org.apache.myfaces.webapp.MyFacesServlet.service(MyFacesServlet.java:77)
        at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:100)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
        at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
        at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
        at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)


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