--- old/src/java.desktop/windows/native/libawt/windows/awt_Toolkit.cpp	2015-08-03 17:08:40.045744100 +0300
+++ new/src/java.desktop/windows/native/libawt/windows/awt_Toolkit.cpp	2015-08-03 17:08:39.465686100 +0300
@@ -321,6 +321,7 @@
     ::GetKeyboardState(m_lastKeyboardState);
 
     m_waitEvent = ::CreateEvent(NULL, FALSE, FALSE, NULL);
+    isInDoDragDropLoop = FALSE;
     eventNumber = 0;
 }
 
@@ -2663,8 +2664,14 @@
 {
     AwtToolkit & tk = AwtToolkit::GetInstance();
     DWORD eventNumber = tk.eventNumber;
-    tk.PostMessage(WM_SYNC_WAIT, 0, 0);
-    ::WaitForSingleObject(tk.m_waitEvent, INFINITE);
+    if (!tk.isInDoDragDropLoop) {
+        tk.PostMessage(WM_SYNC_WAIT, 0, 0);
+        while (WAIT_TIMEOUT == ::WaitForSingleObject(tk.m_waitEvent, 2)) {
+            if (tk.isInDoDragDropLoop) {
+                break;
+            }
+        }
+    }
     DWORD newEventNumber = tk.eventNumber;
     return (newEventNumber - eventNumber) > 2;
 }