1 /* 2 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @bug 6219755 27 * @summary Write end loops infinitely when the 28 * buffer is full and the read end has closed. 29 */ 30 31 import java.io.*; 32 33 public class WriterLoop extends Thread { 34 35 static PipedOutputStream out; 36 static PipedInputStream in; 37 run()38 public void run() { 39 try { 40 System.out.println("Writer started."); 41 42 // without the fix, this test will hang at this point, 43 // i.e inside the call to write() 44 out.write(new byte[64*1024]); 45 } catch (Throwable e) { 46 47 // with the fix an IOException is caught 48 System.out.println("Writer exception:"); 49 e.printStackTrace(); 50 } finally { 51 System.out.println("Writer done."); 52 } 53 } 54 main(String args[])55 public static void main(String args[]) throws Exception { 56 in = new PipedInputStream(); 57 out = new PipedOutputStream(in); 58 WriterLoop writer = new WriterLoop(); 59 writer.start(); 60 61 try { 62 System.out.println("Reader reading..."); 63 in.read(new byte[2048]); 64 65 System.out.println("Reader closing stream..."); 66 in.close(); 67 68 System.out.println("Reader sleeping 3 seconds..."); 69 Thread.sleep(3000); 70 } catch (Throwable e) { 71 System.out.println("Reader exception:"); 72 e.printStackTrace(); 73 } finally { 74 System.out.println("Active threads:"); 75 Thread[] threads = new Thread[Thread.activeCount()]; 76 Thread.enumerate(threads); 77 for (int i = 0; i < threads.length; i++) { 78 System.out.println(" " + threads[i]); 79 } 80 System.out.println("Waiting for writer..."); 81 writer.join(); 82 System.out.println("Done."); 83 } 84 } 85 } 86