/* * Copyright (c) 2019, 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 8220684 * @summary Process.waitFor(long, TimeUnit) can return false for a process * that exited within the timeout * @run main/othervm WaitFor */ import java.io.InputStream; import java.io.OutputStream; import java.util.concurrent.TimeUnit; public class WaitFor { public static void main(String[] args) throws Throwable { int failCnt = 0; for (int i = 0; i < 100; ++i) { Process proc = new MyProcess(new ProcessBuilder("true").start()); boolean exited = proc.waitFor(100, TimeUnit.MILLISECONDS); if (!exited) failCnt++; } if (failCnt > 10) { throw new RuntimeException(failCnt + " processes were still alive" + " after timeout"); } } } /** * This class uses the default implementation of java.lang.Process#waitFor(long, * TimeUnit), and delegated all other calls to the actual implementation of * Process. */ class MyProcess extends Process { Process impl; public MyProcess(Process impl) { this.impl = impl; } public OutputStream getOutputStream() { return impl.getOutputStream(); } public InputStream getInputStream() { return impl.getInputStream(); } public InputStream getErrorStream() { return impl.getErrorStream(); } public int waitFor() throws InterruptedException { return impl.waitFor(); } public int exitValue() { return impl.exitValue(); } public void destroy() { impl.destroy(); } public ProcessHandle toHandle() { return impl.toHandle(); } }