From f49fa023290c4c4253e114cbffa37113bbb1bdf9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juraci=20Paix=C3=A3o=20Kr=C3=B6hling?= <juraci@kroehling.de>
Date: Tue, 11 Nov 2014 14:03:21 +0100
Subject: [PATCH] PBR-570 BZ1162145 - Check for committed responses before
 resetting the buffer.

---
 .../context/exception/PortletExceptionHandler.java       | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/core/impl/src/main/java/org/jboss/portletbridge/context/exception/PortletExceptionHandler.java b/core/impl/src/main/java/org/jboss/portletbridge/context/exception/PortletExceptionHandler.java
index a1f2fd2..6c42cbb 100644
--- a/core/impl/src/main/java/org/jboss/portletbridge/context/exception/PortletExceptionHandler.java
+++ b/core/impl/src/main/java/org/jboss/portletbridge/context/exception/PortletExceptionHandler.java
@@ -79,10 +79,13 @@ public void handle() throws FacesException {
                                 // this would happen if there's an error on the
                                 // errorView and would cause an infinite loop
                                 if (!errorView.equals(bridgeContext.getRedirectViewId())) {
-                                    fc.getExternalContext().responseReset();
-                                    fc.getExternalContext().setResponseBufferSize(-1);
+                                    // browser has seen already some content, so, we can't
+                                    // reset the buffer/response
+                                    if (!fc.getExternalContext().isResponseCommitted()) {
+                                        fc.getExternalContext().responseReset();
+                                        fc.getExternalContext().setResponseBufferSize(-1);
+                                    }
                                     bridgeContext.setRedirectViewId(errorView);
-
                                     bridgeContext.setRenderRedirect(true);
                                 }
                             } else {