408117 isAsyncStarted is false on redispatch

jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannelState.java

@@ -569,6 +569,24 @@ public class HttpChannelState
         }
     }
 
+    public boolean isAsyncStarted()
+    {
+        synchronized (this)
+        {
+            switch(_state)
+            {
+                case ASYNCSTARTED:
+                case REDISPATCHING:
+                case COMPLETECALLED:
+                case ASYNCWAIT:
+                    return true;
+
+                default:
+                    return false;
+            }
+        }
+    }
+
     public boolean isAsync()
     {
         synchronized (this)

jetty-server/src/main/java/org/eclipse/jetty/server/Request.java

@@ -1390,7 +1390,7 @@ public class Request implements HttpServletRequest
     @Override
     public boolean isAsyncStarted()
     {
-       return getHttpChannelState().isAsync();
+       return getHttpChannelState().isAsyncStarted();
     }