.opensymphony.xwork2.Defauinvocation.invoke{Defauinvocation.java:248}
.apache.struts2.impl.strutsaProxy.execute{strutsaProxy.java:52}
.apache.struts2.dispatcher.Dispatcher.servition{Dispatcher.java:485}
.apache.struts2.dispatcher.ng.executeoperations.executea{executeoperations.java:77}
.apache.struts2.dispatcher.ng.filter.strutsPrepareaeFilter.doFilter{strutsPrepareaeFilter.java:91}
\r
note the full stack trace of the root cause is avaible in the apache tomcat/7.0.62 logs.