src/java.desktop/share/classes/com/sun/media/sound/AbstractLine.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -45,11 +45,11 @@
 abstract class AbstractLine implements Line {
 
     protected final Line.Info info;
     protected Control[] controls;
     AbstractMixer mixer;
-    private boolean open     = false;
+    private volatile boolean open;
     private final Vector<Object> listeners = new Vector<>();
 
     /**
      * Contains event dispatcher per thread group.
      */