This test fails for various reasons: one of the is JDK-8158918 and another is unlucky timing with current implementation of realSync machinery. Namely, on OEL 7 (but not only, I guess) the test fails intermittently at the very beginning (see the rule below for an example of exception). This is a fix for that issue which works for me:

--- a/test/java/awt/Frame/MaximizedToIconified/MaximizedToIconified.java Wed Jun 29 14:47:58 2016 +0530
+++ b/test/java/awt/Frame/MaximizedToIconified/MaximizedToIconified.java Mon Jul 04 13:57:19 2016 +0300
@@ -51,10 +51,12 @@
     static volatile int lastFrameState = Frame.NORMAL;
     static volatile boolean failed = false;
     static volatile Toolkit myKit;
+ static Robot robot = null;
 
     private static void checkState(Frame f, int state) {
         f.setExtendedState(state);
- Util.waitForIdle(null);
+ Util.waitForIdle(robot);
+ robot.delay(100);
 
         System.out.println("state = " + state + "; getExtendedState() = " + f.getExtendedState());
 
@@ -79,7 +81,8 @@
             f.setVisible(true);
         }
 
- Util.waitForIdle(null);
+ Util.waitForIdle(robot);
+ robot.delay(100);
 
         f.addWindowStateListener(new WindowStateListener() {
             public void windowStateChanged(WindowEvent e) {
@@ -158,6 +161,11 @@
     // it for now.
     public static void main( String args[] ) throws InterruptedException
     {
+ try {
+ robot = new Robot();
+ }catch(Exception noRobotEx){
+ noRobotEx.printStackTrace();
+ }
         mainThread = Thread.currentThread();
         try
         {

RULE "java/awt/Frame/MaximizedToIconified/MaximizedToIconified.java" Exception java.lang.RuntimeException: getExtendedState() != last getNewState() in WINDOW_STATE_CHANGED event.