--- /dev/null 2013-08-26 17:11:22.438994876 +0200 +++ new/test/javax/imageio/plugins/jpeg/JpegWriterLeakTest.java 2013-08-26 17:52:47.806480091 +0200 @@ -0,0 +1,125 @@ +/* + * Copyright (c) 2013, 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. + */ + +/** + * @test + * @bug 8020983 + * @summary Test verifies that jpeg writer instances are collected + * even if destroy() or reset() methods is not invoked. + * + * @run main JpegWriterLeakTest + */ + +import java.awt.Color; +import java.awt.Graphics2D; +import java.awt.image.BufferedImage; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.lang.ref.Reference; +import java.lang.ref.ReferenceQueue; +import java.lang.ref.WeakReference; +import java.util.ArrayList; +import java.util.Random; +import javax.imageio.ImageIO; +import javax.imageio.ImageWriter; +import javax.imageio.stream.ImageOutputStream; + +public class JpegWriterLeakTest { + + public static void main(String[] args) { + final ReferenceQueue queue = new ReferenceQueue(); + final ArrayList> refs = new ArrayList>(); + + int count = 2; + + do { + ImageWriter writer = + ImageIO.getImageWritersByFormatName("jpeg").next(); + + final WeakReference ref = + new WeakReference(writer, queue); + + refs.add(ref); + + + try { + final ImageOutputStream os = + ImageIO.createImageOutputStream(new ByteArrayOutputStream()); + writer.setOutput(os); + + writer.write(getImage()); + + + // NB: dispose() or reset() workarounds the problem. + } catch (IOException e) { + } finally { + writer = null; + } + count--; + } while (count > 0); + + + System.out.println("Wait for GC..."); + + final long testTimeOut = 60000L; + + final long startTime = System.currentTimeMillis(); + + while (!refs.isEmpty()) { + // check for the test timeout + final long now = System.currentTimeMillis(); + + if (now - startTime > testTimeOut) { + System.out.println(); + throw new RuntimeException("Test FAILED."); + } + + System.gc(); + + try { + System.out.print("."); + Thread.sleep(1000); + } catch (InterruptedException e) { + }; + + Reference r = queue.poll(); + if (r != null) { + System.out.println("Got reference: " + r); + refs.remove(r); + } + } + System.out.println("Test PASSED."); + } + + private static BufferedImage getImage() { + int width = 2500; + int height = new Random().nextInt(2500) + 1; + BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); + + Graphics2D g = image.createGraphics(); + g.setColor(Color.blue); + g.fillRect(0, 0, width, height); + + return image; + } +}