1 /*

     2  * Copyright (c) 2019, 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 8231666

    27  * @summary Test checks that new threads could be successfully started when the thread

    28  * table introduced in 8185005 is growing. The test enables the thread table by calling

    29  * ThreadMXBean.getThreadInfo() and then creates a number of threads to force the thread

    30  * table to grow.

    31  *

    32  * @run main ThreadStartTest

    33  */

    34 

    35 import java.lang.management.ManagementFactory;

    36 import java.lang.management.ThreadMXBean;

    37 

    38 public class ThreadStartTest {

    39     public static void main(String[] args) {

    40 

    41         ThreadMXBean mbean = ManagementFactory.getThreadMXBean();

    42         // Enable thread table

    43         mbean.getThreadInfo(Thread.currentThread().getId());

    44 

    45         // Create a large number of threads to make the thread table grow

    46         for (int i = 0; i < 1000; i++) {

    47             Thread t = new Thread(() -> {

    48                 try {

    49                     Thread.sleep(1000);

    50                 } catch (InterruptedException ex) {

    51                 }

    52             });

    53             t.start();

    54         }

    55     }

    56 }