Index: src/share/classes/org/apache/catalina/connector/Response.java
===================================================================
--- src/share/classes/org/apache/catalina/connector/Response.java	(revision 1041)
+++ src/share/classes/org/apache/catalina/connector/Response.java	(working copy)
@@ -651,6 +651,9 @@
 
         coyoteResponse.reset();
         outputBuffer.reset();
+        usingOutputStream = false; 
+        usingWriter = false;
+        isCharacterEncodingSet = false;
     }