test/jdk/java/net/Socket/asyncClose/Race.java
changeset 47216 71c04702a3d5
parent 16866 e659009ee08d
child 49573 6b46983d6fbe
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/net/Socket/asyncClose/Race.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,77 @@
+/*
+ * 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 8006395 8012244
+ * @summary Tests racing code that reads and closes a Socket
+ */
+
+import java.io.InputStream;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.SocketException;
+import java.util.concurrent.Phaser;
+
+// Racey test, will not always fail, but if it does then we have a problem.
+
+public class Race {
+    final static int THREADS = 100;
+
+    public static void main(String[] args) throws Exception {
+        try (ServerSocket ss = new ServerSocket(0)) {
+            final int port = ss.getLocalPort();
+            final Phaser phaser = new Phaser(THREADS + 1);
+            for (int i=0; i<100; i++) {
+                final Socket s = new Socket("localhost", port);
+                s.setSoLinger(false, 0);
+                try (Socket sa = ss.accept()) {
+                    sa.setSoLinger(false, 0);
+                    final InputStream is = s.getInputStream();
+                    Thread[] threads = new Thread[THREADS];
+                    for (int j=0; j<THREADS; j++) {
+                        threads[j] = new Thread() {
+                        public void run() {
+                            try {
+                                phaser.arriveAndAwaitAdvance();
+                                while (is.read() != -1)
+                                    Thread.sleep(50);
+                            } catch (Exception x) {
+                                if (!(x instanceof SocketException
+                                      && x.getMessage().equalsIgnoreCase("socket closed")))
+                                    x.printStackTrace();
+                                // ok, expect Socket closed
+                            }
+                        }};
+                    }
+                    for (int j=0; j<100; j++)
+                        threads[j].start();
+                    phaser.arriveAndAwaitAdvance();
+                    s.close();
+                    for (int j=0; j<100; j++)
+                        threads[j].join();
+                }
+            }
+        }
+    }
+}