2014-12-03 09:25:59,998 ajp-bio-127.0.0.1-8009-exec-10612 ERROR - org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/kbase].[FacesServlet]:260 - Servlet.service() for servlet [FacesServlet] in context with path [/kbase] threw exception [null] with root cause
java.lang.NullPointerException
at org.apache.myfaces.tobago.renderkit.util.RenderUtils.decodedStateOfTreeData(RenderUtils.java:415)
at org.apache.myfaces.tobago.renderkit.html.standard.standard.tag.TreeRenderer.decode(TreeRenderer.java:56)