yes it is.
here is part of my log file after authorization fail:
2016-07-04 04:11:39,985 ERROR [org.jboss.seam.jsf.SeamPhaseListener] swallowing exception
javax.el.ELException: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:339)
at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:348)
at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:221)
at org.jboss.seam.navigation.Page.preRender(Page.java:311)
at org.jboss.seam.navigation.Pages.preRender(Pages.java:351)
at org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:560)
at org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:471)
at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:147)
at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:117)
at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:214)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:96)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)