--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/AbstractDataLine.java	Mon May 16 22:57:40 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/AbstractDataLine.java	Wed May 18 20:40:17 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -59,10 +59,9 @@
     // current buffer size in bytes
     protected int bufferSize;
 
-    protected boolean running = false;
-    private boolean started = false;
-    private boolean active = false;
-
+    private volatile boolean running;
+    private volatile boolean started;
+    private volatile boolean active;
 
     /**
      * Constructs a new AbstractLine.

--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/AbstractLine.java	Mon May 16 22:57:40 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/AbstractLine.java	Wed May 18 20:40:17 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -47,7 +47,7 @@
     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<>();
 
     /**

--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/AbstractMidiDevice.java	Mon May 16 22:57:40 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/AbstractMidiDevice.java	Wed May 18 20:40:17 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2014, 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
@@ -65,7 +65,7 @@
 
     // DEVICE STATE
 
-    private boolean open          = false;
+    private volatile boolean open;
     private int openRefCount;
 
     /** List of Receivers and Transmitters that opened the device implicitely.
@@ -75,7 +75,7 @@
     /**
      * This is the device handle returned from native code
      */
-    protected long id                   = 0;
+    protected volatile long id;
 
 
 
@@ -479,7 +479,7 @@
         (which opens the device implicitely).
      */
     abstract class AbstractReceiver implements MidiDeviceReceiver {
-        private boolean open = true;
+        private volatile boolean open = true;
 
 
         /** Deliver a MidiMessage.

--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/MidiInDevice.java	Mon May 16 22:57:40 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/MidiInDevice.java	Wed May 18 20:40:17 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -38,7 +38,7 @@
  */
 final class MidiInDevice extends AbstractMidiDevice implements Runnable {
 
-    private Thread midiInThread = null;
+    private volatile Thread midiInThread;
 
     // CONSTRUCTOR
 

--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/RealTimeSequencer.java	Mon May 16 22:57:40 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/RealTimeSequencer.java	Wed May 18 20:40:17 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 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
@@ -106,7 +106,7 @@
     /**
      * True if the sequence is running.
      */
-    private boolean running = false;
+    private volatile boolean running;
 
 
     /** the thread for pushing out the MIDI messages */
@@ -116,7 +116,7 @@
     /**
      * True if we are recording
      */
-    private boolean recording = false;
+    private volatile boolean recording;
 
 
     /**

--- a/jdk/src/java.desktop/share/classes/javax/sound/midi/Sequence.java	Mon May 16 22:57:40 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/javax/sound/midi/Sequence.java	Wed May 18 20:40:17 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2014, 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
@@ -266,11 +266,7 @@
      * @see #getTracks
      */
     public boolean deleteTrack(Track track) {
-
-        synchronized(tracks) {
-
-            return tracks.removeElement(track);
-        }
+        return tracks.removeElement(track);
     }
 
     /**
@@ -282,8 +278,8 @@
      * @see #deleteTrack
      */
     public Track[] getTracks() {
-
-        return tracks.toArray(new Track[tracks.size()]);
+        // Creation of the non-empty array will be synchronized inside toArray()
+        return tracks.toArray(new Track[0]);
     }
 
     /**

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/sound/sampled/Clip/IsRunningHang.java	Wed May 18 20:40:17 2016 +0300
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.Clip;
+import javax.sound.sampled.DataLine;
+import javax.sound.sampled.Line;
+import javax.sound.sampled.LineEvent;
+import javax.sound.sampled.LineUnavailableException;
+
+/**
+ * @test
+ * @bug 8156169
+ * @run main/othervm/timeout=300 IsRunningHang
+ */
+public final class IsRunningHang {
+
+    private static CountDownLatch go;
+
+    /**
+     * We will try to use all usually supported formats.
+     */
+    private static final List<AudioFormat> formats = new ArrayList<>();
+
+    private static final AudioFormat.Encoding[] encodings = {
+            AudioFormat.Encoding.ALAW, AudioFormat.Encoding.ULAW,
+            AudioFormat.Encoding.PCM_SIGNED, AudioFormat.Encoding.PCM_UNSIGNED,
+            AudioFormat.Encoding.PCM_FLOAT
+    };
+
+    private static final int[] sampleRates = {8000, 16000, 48000};
+
+    private static final int[] sampleBits = {8, 16, 24, 32, 64};
+
+    private static final int[] channels = {1, 2, 3, 5};
+
+    static {
+        for (final Boolean end : new boolean[]{false, true}) {
+            for (final int sampleSize : sampleBits) {
+                for (final int sampleRate : sampleRates) {
+                    for (final int channel : channels) {
+                        for (final AudioFormat.Encoding enc : encodings) {
+                            int s = ((sampleSize + 7) / 8) * channel;
+                            formats.add(new AudioFormat(enc, sampleRate,
+                                                        sampleSize, channel,
+                                                        s, sampleRate, end));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public static void main(final String[] args) throws Exception {
+        for (final AudioFormat format : formats) {
+            System.out.println("format = " + format);
+            // create a 0.5-second data
+            byte[] soundData = new byte[(int) (format.getFrameRate()
+                                                       * format.getFrameSize()
+                                                       / 2)];
+            try {
+                test(format, soundData);
+            } catch (LineUnavailableException | IllegalArgumentException ignored) {
+                // the test is not applicable
+            }
+        }
+    }
+
+    private static void test(final AudioFormat format, final byte[] data)
+            throws Exception {
+        final Line.Info info = new DataLine.Info(Clip.class, format);
+        final Clip clip = (Clip) AudioSystem.getLine(info);
+
+        go = new CountDownLatch(1);
+        clip.addLineListener(event -> {
+            if (event.getType().equals(LineEvent.Type.START)) {
+                go.countDown();
+            }
+        });
+
+        clip.open(format, data, 0, data.length);
+        clip.start();
+        go.await();
+        while (clip.isRunning()) {
+            // This loop should not hang
+        }
+        while (clip.isActive()) {
+            // This loop should not hang
+        }
+        clip.close();
+    }
+}