JVM Thread DUmp文件分析-定位线程Wait状态

「爱情、让人受尽委屈。」 2023-01-09 01:21 128阅读 0赞

源代码如下：

package com.mytest.Learning;
    
    import java.util.concurrent.TimeUnit;
    
    public class WaitState { 
        public static void main(String [] args){ 
            Thread thread = new Thread("线程1"){ 
                public void run() { 
                    synchronized (this) { 
                        System.out.println(Thread.currentThread().getName());
                        try { 
                            wait();
                        } catch (InterruptedException e) { 
                            e.printStackTrace();
                        }
                    }
                }
            };
            thread.start();
            try { 
                TimeUnit.SECONDS.sleep(30);
            } catch (InterruptedException e) { 
                e.printStackTrace();
            }
            synchronized (thread){ 
                System.out.println(Thread.currentThread().getName());
                try { 
                    TimeUnit.SECONDS.sleep(30);
                } catch (InterruptedException e) { 
                    e.printStackTrace();
                }
                thread.notify();
            }
        }
    }

执行10秒后，获取thread dump文件

jps
     ./jstack -l 53052 > d:\\jstack.log

线程状态如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2EyMDA4MjIxNDYwODU_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2EyMDA4MjIxNDYwODU_size_16_color_FFFFFF_t_70]: /images/20221119/f08ca5d702684fa79bacbc02232acdd3.png