1 /* 2 * Copyright (c) 2002, 2017, 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 import java.net.SocketException; 25 import java.nio.channels.DatagramChannel; 26 import java.nio.channels.Pipe; 27 import java.nio.channels.ServerSocketChannel; 28 import java.nio.channels.SocketChannel; 29 import java.nio.channels.spi.SelectorProvider; 30 31 public class Open { 32 33 static void test1() { 34 for (int i=0; i<11000; i++) { 35 try { 36 SocketChannel sc = SocketChannel.open(); 37 } catch (Exception e) { 38 // Presumably "Too many open files" 39 } 40 } 41 } 42 static void test2() { 43 for (int i=0; i<11000; i++) { 44 try { 45 DatagramChannel sc = DatagramChannel.open(); 46 } catch (Exception e) { 47 // Presumably "Too many open files" 48 } 49 } 50 } 51 static void test3() { 52 SelectorProvider sp = SelectorProvider.provider(); 53 for (int i=0; i<11000; i++) { 54 try { 55 Pipe p = sp.openPipe(); 56 } catch (Exception e) { 57 // Presumably "Too many open files" 58 } 59 } 60 } 61 static void test4() { 62 for (int i=0; i<11000; i++) { 63 try { 64 ServerSocketChannel sc = ServerSocketChannel.open(); 65 } catch (Exception e) { 66 // Presumably "Too many open files" 67 } 68 } 69 } 70 71 public static void main(String[] args) throws Exception { 72 73 // Load necessary classes ahead of time 74 DatagramChannel dc = DatagramChannel.open(); 75 Exception se = new SocketException(); 76 SelectorProvider sp = SelectorProvider.provider(); 77 Pipe p = sp.openPipe(); 78 ServerSocketChannel ssc = ServerSocketChannel.open(); 79 80 test1(); 81 test2(); 82 test3(); 83 test4(); 84 } 85 86 }