--- /dev/null	2015-05-20 16:55:48.000000000 +0400
+++ new/test/tools/pack200/DefaultTimeZoneTest.java	2015-05-20 16:55:47.240944700 +0400
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2015, 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.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.TimeZone;
+import java.util.concurrent.CountDownLatch;
+import java.util.jar.JarFile;
+import java.util.jar.JarOutputStream;
+import java.util.jar.Pack200;
+
+/*
+ * @test
+ * @bug 8066985
+ * @summary multithreading packing/unpacking files can result in Timezone set to UTC
+ * @compile -XDignore.symbol.file Utils.java DefaultTimeZoneTest.java
+ * @run main/othervm DefaultTimeZoneTest
+ * @author mcherkas
+ */
+
+
+public class DefaultTimeZoneTest {
+
+    private static final TimeZone tz = TimeZone.getTimeZone("Europe/Moscow");
+    private static final int INIT_THREAD_COUNT = Math.min(4, Runtime.getRuntime().availableProcessors());
+    private static final int MAX_THREAD_COUNT = 4 * INIT_THREAD_COUNT;
+    private static final long MINUTE = 60 * 1000;
+
+    private static class NoOpOutputStream extends OutputStream {
+        @Override
+        public void write(int b) throws IOException {
+            // no op
+        }
+    }
+
+    static class PackAction implements Runnable {
+        private Pack200.Packer packer = Pack200.newPacker();
+        private JarFile jarFile;
+
+        PackAction() throws IOException {
+            jarFile = new JarFile(new File("golden.jar"));
+        }
+
+        @Override
+        public void run() {
+            try {
+                packer.pack(jarFile, new NoOpOutputStream());
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    static class UnpackAction implements Runnable {
+        private Pack200.Unpacker unpacker = Pack200.newUnpacker();
+        private JarOutputStream jos;
+        private File packedJar = new File("golden.pack");
+
+        UnpackAction() throws IOException {
+            jos = new JarOutputStream(new NoOpOutputStream());
+        }
+
+        @Override
+        public void run() {
+            try {
+                unpacker.unpack(packedJar, jos);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            } finally {
+                try {
+                    jos.close();
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        }
+    };
+
+    public static void test(final Class<? extends Runnable> runnableClass) throws InterruptedException {
+        for (int i = INIT_THREAD_COUNT; i <= MAX_THREAD_COUNT; i*=2) {
+            final CountDownLatch startLatch = new CountDownLatch(i);
+            final CountDownLatch doneLatch = new CountDownLatch(i);
+            for (int j = 0; j < i; j++) {
+                new Thread() {
+                    @Override
+                    public void run() {
+                        try {
+                            Runnable r = runnableClass.newInstance();
+                            startLatch.countDown();
+                            startLatch.await();
+                            r.run();
+                        } catch (Exception e) {
+                            throw new RuntimeException(e);
+                        } finally {
+                            doneLatch.countDown();
+                        }
+                    }
+                }.start();
+            }
+            doneLatch.await();
+
+            if(!TimeZone.getDefault().equals(tz)) {
+                throw new RuntimeException("FAIL: default time zone was changed");
+            }
+        }
+    }
+
+    public static void main(String args[]) throws IOException, InterruptedException {
+        TimeZone.setDefault(tz);
+
+        // make a local copy of our test file
+        File srcFile = Utils.locateJar("golden.jar");
+        final File goldenFile = new File("golden.jar");
+        Utils.copyFile(srcFile, goldenFile);
+
+        // created packed file
+        final JarFile goldenJarFile = new JarFile(goldenFile);
+        final File packFile = new File("golden.pack");
+        Utils.pack(goldenJarFile, packFile);
+
+        // before test let's unpack golden pack to warm up
+        // a native unpacker. That allow us to avoid JDK-8080438
+        UnpackAction unpackAction = new UnpackAction();
+        unpackAction.run();
+
+        long startTime = System.currentTimeMillis();
+        while(System.currentTimeMillis() - startTime < MINUTE) {
+            // test packer
+            test(PackAction.class);
+
+            // test unpacker
+            test(UnpackAction.class);
+        }
+
+        Utils.cleanup();
+    }
+}