--- catalina/src/share/org/apache/catalina/connector/CoyoteReader.java	(revision 551254)
+++ catalina/src/share/org/apache/catalina/connector/CoyoteReader.java	(working copy)
@@ -153,7 +153,7 @@ 
             while ((pos < MAX_LINE_LENGTH) && (end < 0)) {
                 int nRead = read(lineBuffer, pos, MAX_LINE_LENGTH - pos);
                 if (nRead < 0) {
-                    if (pos == 0) {
+                    if (pos == 0 && aggregator == null) {
                         return null;
                     }
                     end = pos;