src/share/classes/java/awt/DefaultKeyboardFocusManager.java

@@ -281,14 +281,24 @@
     private boolean repostIfFollowsKeyEvents(WindowEvent e) {
         if (!(e instanceof TimedWindowEvent)) {
             return false;
         }
         TimedWindowEvent we = (TimedWindowEvent)e;
+        if (we.isReposted()) {
+            // It is expected that the key events waiting in the type-ahead queue
+            // get dispatched during the first repost cycle. If they don't, there's
+            // likely a dependency b/w the key events and the focus window event
+            // (a type-ahead marker may be targeted at a component belonging to the
+            // window awaiting activation and focus). So, to avoid the risk of endless
+            // repost cycle, a focus window event is not reposted repeatedely. See 8015454.
+            return false;
+        }
         long time = we.getWhen();
         synchronized (this) {
             for (KeyEvent ke: enqueuedKeyEvents) {
                 if (time >= ke.getWhen()) {
+                    we.setReposted();
                     SunToolkit.postEvent(AppContext.getAppContext(), new SequencedEvent(e));
                     return true;
                 }
             }
         }