1 /*
   2  * Copyright (c) 2013, 2018, 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 import jdk.test.lib.process.OutputAnalyzer;
  26 import jdk.testlibrary.Utils;
  27 
  28 import java.io.IOException;
  29 import java.net.ServerSocket;
  30 import java.util.logging.Logger;
  31 
  32 /**
  33  * This test used for test development and it is not meant to be run by JTReg.
  34  * <p/>
  35  * This test exercises a retry mechanism to avoid a test failure because of
  36  * starting the VM on a busy jmxremote.port.
  37  * <p/>
  38  * To run this test you'll need to add this VM option: -Dtest.jdk=<path-to-jdk>
  39  */
  40 public class PortAlreadyInUseTest extends DynamicLauncher {
  41 
  42     ServerSocket socket;
  43     final Logger log = Logger.getLogger("PortAlreadyInUse");
  44 
  45     protected void go() throws Exception {
  46         jmxPort = Utils.getFreePort();
  47         occupyPort();
  48 
  49         log.info("Attempting to start a VM using the same port.");
  50         OutputAnalyzer out = this.runVM();
  51         out.shouldContain("Port already in use");
  52         log.info("Failed as expected.");
  53 
  54         log.info("Trying again using retries.");
  55         this.run();
  56     }
  57 
  58     private void occupyPort() throws IOException {
  59         socket = new ServerSocket(jmxPort);
  60         log.info("Occupying port " + String.valueOf(jmxPort));
  61     }
  62 
  63     protected String[] options() {
  64         String[] options = {
  65                 "-Dcom.sun.management.jmxremote.authenticate=false",
  66                 "-Dcom.sun.management.jmxremote.ssl=false",
  67                 "-Dcom.sun.management.jmxremote=true",
  68                 "-Dcom.sun.management.jmxremote.port=" + String.valueOf(jmxPort),
  69                 "-version"
  70         };
  71         return options;
  72     }
  73 
  74     public static void main(String[] args) throws Exception {
  75         PortAlreadyInUseTest test = new PortAlreadyInUseTest();
  76         test.go();
  77     }
  78 
  79 }