1 /*
   2  * Copyright (c) 2003, 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 4757273
  27  * @summary Test deadlock in MBeanServerDelegate listeners
  28  * @author Eamonn McManus

  29  * @run clean NotifDeadlockTest
  30  * @run build NotifDeadlockTest
  31  * @run main NotifDeadlockTest
  32  */
  33 
  34 /*
  35  * Test deadlock when a listener for an MBeanServerDelegate does a
  36  * register or unregister of an MBean.  Since such a listener is
  37  * triggered by a register or unregister operation, deadlock scenarios
  38  * are possible if there are any locks held while the listener is
  39  * being dispatched.
  40  *
  41  * The flow of control looks rather like this:
  42  *
  43  * Thread 1:
  44  * - MBeanServer.createMBean(..., objectName1);
  45  * --- MBeanServerDelegate.sendNotification
  46  * ----- XListener.handleNotification
  47  * ------- create Thread 2
  48  * ------- wait for Thread 2 to complete

   1 /*
   2  * Copyright (c) 2003, 2015, 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 4757273
  27  * @summary Test deadlock in MBeanServerDelegate listeners
  28  * @author Eamonn McManus
  29  * @modules java.management
  30  * @run clean NotifDeadlockTest
  31  * @run build NotifDeadlockTest
  32  * @run main NotifDeadlockTest
  33  */
  34 
  35 /*
  36  * Test deadlock when a listener for an MBeanServerDelegate does a
  37  * register or unregister of an MBean.  Since such a listener is
  38  * triggered by a register or unregister operation, deadlock scenarios
  39  * are possible if there are any locks held while the listener is
  40  * being dispatched.
  41  *
  42  * The flow of control looks rather like this:
  43  *
  44  * Thread 1:
  45  * - MBeanServer.createMBean(..., objectName1);
  46  * --- MBeanServerDelegate.sendNotification
  47  * ----- XListener.handleNotification
  48  * ------- create Thread 2
  49  * ------- wait for Thread 2 to complete