贴代码啦
1 public class App { 2 3 final static Object lock = new Object(); 4 5 public static void main(String[] args) throws InterruptedException { 6 testWait(); 7 testTimedWait(); 8 } 9 10 /** 11 * 当进入NotifyThread，10s内dump，可以看到WaitThread是WAITING状态；<br/> 12 * 当打印"start to notify", 10s内dump，可以看到WaitThread是BLOCKED状态。<br/> 13 * 说明notify唤醒了WaitThread，使其由等待队列迁移到同步队列。 14 * 15 * @throws InterruptedException 16 */ 17 private static void testWait() throws InterruptedException { 18 Thread waitThread = new Thread(new Runnable() { 19 public void run() { 20 synchronized (lock) { 21 try { 22 lock.wait(); 23 } catch (InterruptedException e) { 24 e.printStackTrace(); 25 } 26 } 27 } 28 }, "WaitThread"); 29 30 Thread notifyThread = new Thread(new Runnable() { 31 public void run() { 32 synchronized (lock) { 33 System.out.println("enter notify thread"); 34 try { 35 Thread.sleep(10000L); 36 } catch (InterruptedException e) { 37 e.printStackTrace(); 38 } 39 System.out.println("start to notify"); 40 lock.notify(); 41 try { 42 Thread.sleep(10000L); 43 } catch (InterruptedException e) { 44 e.printStackTrace(); 45 } 46 } 47 } 48 }, "NotifyThread"); 49 50 waitThread.start(); 51 Thread.sleep(1000L); 52 notifyThread.start(); 53 } 54 55 /** 56 * 当进入NotifyThread，10s内dump，可以看到WaitThread是WAITING状态；<br/> 57 * 10s-30s之间dump，可以看到WaitThread是BLOCKED状态。<br/> 58 * 说明WaitThread未等NotifyThread唤醒，自己超时唤醒了。<br/> 59 * 在打印"start to notify"之后再次dump，WaitThread仍然是BLOCKED. 60 * 61 * @throws InterruptedException 62 */ 63 private static void testTimedWait() throws InterruptedException { 64 Thread waitThread = new Thread(new Runnable() { 65 public void run() { 66 synchronized (lock) { 67 try { 68 lock.wait(10000L); 69 } catch (InterruptedException e) { 70 e.printStackTrace(); 71 } 72 } 73 } 74 }, "WaitThread"); 75 76 Thread notifyThread = new Thread(new Runnable() { 77 public void run() { 78 synchronized (lock) { 79 System.out.println("enter notify thread"); 80 try { 81 Thread.sleep(30000L); 82 } catch (InterruptedException e) { 83 e.printStackTrace(); 84 } 85 System.out.println("start to notify"); 86 lock.notify(); 87 try { 88 Thread.sleep(10000L); 89 } catch (InterruptedException e) { 90 e.printStackTrace(); 91 } 92 } 93 } 94 }, "NotifyThread"); 95 96 waitThread.start(); 97 Thread.sleep(1000L); 98 notifyThread.start(); 99 } 100 }
按照代码的注释操作，控制台的输出如下，观察WaitThread的变化。
testWait():
enter notify thread 2018-04-05 17:51:13 Full thread dump Java HotSpot(TM) 64-Bit Server VM (23.7-b01 mixed mode): "DestroyJavaVM" prio=6 tid=0x000000000262e000 nid=0x2d88 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "NotifyThread" prio=6 tid=0x000000000da27800 nid=0x15dc waiting on condition [0x000000000e92e000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at com.smart.dao.App$2.run(App.java:42) - locked <0x00000007d6009628> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "WaitThread" prio=6 tid=0x000000000da3d000 nid=0x2ce0 in Object.wait() [0x000000000e72f000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d6009628> (a java.lang.Object) at java.lang.Object.wait(Object.java:503) at com.smart.dao.App$1.run(App.java:28) - locked <0x00000007d6009628> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "Service Thread" daemon prio=6 tid=0x000000000da3c000 nid=0x2d2c runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" daemon prio=10 tid=0x000000000da3b000 nid=0x2ae0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" daemon prio=10 tid=0x000000000da38000 nid=0xa74 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Monitor Ctrl-Break" daemon prio=6 tid=0x000000000d9ef000 nid=0x2db0 runnable [0x000000000dece000] java.lang.Thread.State: RUNNABLE at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:150) at java.net.SocketInputStream.read(SocketInputStream.java:121) at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283) at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177) - locked <0x00000007d60cea18> (a java.io.InputStreamReader) at java.io.InputStreamReader.read(InputStreamReader.java:184) at java.io.BufferedReader.fill(BufferedReader.java:154) at java.io.BufferedReader.readLine(BufferedReader.java:317) - locked <0x00000007d60cea18> (a java.io.InputStreamReader) at java.io.BufferedReader.readLine(BufferedReader.java:382) at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:64) "Attach Listener" daemon prio=10 tid=0x000000000bd1e800 nid=0x2950 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" daemon prio=10 tid=0x000000000bd17800 nid=0x2ff0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" daemon prio=8 tid=0x0000000002848800 nid=0x2d30 in Object.wait() [0x000000000d00e000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) - locked <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177) "Reference Handler" daemon prio=10 tid=0x000000000bc72800 nid=0x29b4 in Object.wait() [0x000000000cf0e000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:503) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) "VM Thread" prio=10 tid=0x000000000bc71800 nid=0x2ea4 runnable "GC task thread#0 (ParallelGC)" prio=6 tid=0x0000000002795000 nid=0x2de8 runnable "GC task thread#1 (ParallelGC)" prio=6 tid=0x0000000002797000 nid=0x2d9c runnable "GC task thread#2 (ParallelGC)" prio=6 tid=0x0000000002798800 nid=0x245c runnable "GC task thread#3 (ParallelGC)" prio=6 tid=0x000000000279a800 nid=0x2b64 runnable "VM Periodic Task Thread" prio=10 tid=0x000000000bd5f000 nid=0x29e0 waiting on condition JNI global references: 135 Heap PSYoungGen total 37696K, used 3878K [0x00000007d5eb0000, 0x00000007d88c0000, 0x0000000800000000) eden space 32320K, 12% used [0x00000007d5eb0000,0x00000007d6279bd8,0x00000007d7e40000) from space 5376K, 0% used [0x00000007d8380000,0x00000007d8380000,0x00000007d88c0000) to space 5376K, 0% used [0x00000007d7e40000,0x00000007d7e40000,0x00000007d8380000) ParOldGen total 86144K, used 0K [0x0000000781c00000, 0x0000000787020000, 0x00000007d5eb0000) object space 86144K, 0% used [0x0000000781c00000,0x0000000781c00000,0x0000000787020000) PSPermGen total 21248K, used 3277K [0x000000077ca00000, 0x000000077dec0000, 0x0000000781c00000) object space 21248K, 15% used [0x000000077ca00000,0x000000077cd33480,0x000000077dec0000) start to notify 2018-04-05 17:51:25 Full thread dump Java HotSpot(TM) 64-Bit Server VM (23.7-b01 mixed mode): "DestroyJavaVM" prio=6 tid=0x000000000262e000 nid=0x2d88 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "NotifyThread" prio=6 tid=0x000000000da27800 nid=0x15dc waiting on condition [0x000000000e92e000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at com.smart.dao.App$2.run(App.java:49) - locked <0x00000007d6009628> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "WaitThread" prio=6 tid=0x000000000da3d000 nid=0x2ce0 in Object.wait() [0x000000000e72f000] java.lang.Thread.State: BLOCKED (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d6009628> (a java.lang.Object) at java.lang.Object.wait(Object.java:503) at com.smart.dao.App$1.run(App.java:28) - locked <0x00000007d6009628> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "Service Thread" daemon prio=6 tid=0x000000000da3c000 nid=0x2d2c runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" daemon prio=10 tid=0x000000000da3b000 nid=0x2ae0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" daemon prio=10 tid=0x000000000da38000 nid=0xa74 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Monitor Ctrl-Break" daemon prio=6 tid=0x000000000d9ef000 nid=0x2db0 runnable [0x000000000decf000] java.lang.Thread.State: RUNNABLE at com.intellij.rt.execution.application.AppMainV2.triggerControlBreak(Native Method) at com.intellij.rt.execution.application.AppMainV2.access$000(AppMainV2.java:32) at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:70) "Attach Listener" daemon prio=10 tid=0x000000000bd1e800 nid=0x2950 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" daemon prio=10 tid=0x000000000bd17800 nid=0x2ff0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" daemon prio=8 tid=0x0000000002848800 nid=0x2d30 in Object.wait() [0x000000000d00e000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) - locked <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177) "Reference Handler" daemon prio=10 tid=0x000000000bc72800 nid=0x29b4 in Object.wait() [0x000000000cf0e000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:503) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) "VM Thread" prio=10 tid=0x000000000bc71800 nid=0x2ea4 runnable "GC task thread#0 (ParallelGC)" prio=6 tid=0x0000000002795000 nid=0x2de8 runnable "GC task thread#1 (ParallelGC)" prio=6 tid=0x0000000002797000 nid=0x2d9c runnable "GC task thread#2 (ParallelGC)" prio=6 tid=0x0000000002798800 nid=0x245c runnable "GC task thread#3 (ParallelGC)" prio=6 tid=0x000000000279a800 nid=0x2b64 runnable "VM Periodic Task Thread" prio=10 tid=0x000000000bd5f000 nid=0x29e0 waiting on condition JNI global references: 135 Heap PSYoungGen total 37696K, used 3878K [0x00000007d5eb0000, 0x00000007d88c0000, 0x0000000800000000) eden space 32320K, 12% used [0x00000007d5eb0000,0x00000007d6279bd8,0x00000007d7e40000) from space 5376K, 0% used [0x00000007d8380000,0x00000007d8380000,0x00000007d88c0000) to space 5376K, 0% used [0x00000007d7e40000,0x00000007d7e40000,0x00000007d8380000) ParOldGen total 86144K, used 0K [0x0000000781c00000, 0x0000000787020000, 0x00000007d5eb0000) object space 86144K, 0% used [0x0000000781c00000,0x0000000781c00000,0x0000000787020000) PSPermGen total 21248K, used 3277K [0x000000077ca00000, 0x000000077dec0000, 0x0000000781c00000) object space 21248K, 15% used [0x000000077ca00000,0x000000077cd33480,0x000000077dec0000) Process finished with exit code 0
testTimedWait():
enter notify thread 2018-04-05 17:56:00 Full thread dump Java HotSpot(TM) 64-Bit Server VM (23.7-b01 mixed mode): "DestroyJavaVM" prio=6 tid=0x000000000264e000 nid=0x2c80 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "NotifyThread" prio=6 tid=0x000000000dae6800 nid=0x2ee8 waiting on condition [0x000000000e70f000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at com.smart.dao.App$2.run(App.java:41) - locked <0x00000007d600a1e0> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "WaitThread" prio=6 tid=0x000000000dc24800 nid=0x2cb4 in Object.wait() [0x000000000e57f000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d600a1e0> (a java.lang.Object) at com.smart.dao.App$1.run(App.java:27) - locked <0x00000007d600a1e0> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "Service Thread" daemon prio=6 tid=0x000000000dafc000 nid=0x1568 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" daemon prio=10 tid=0x000000000dafb000 nid=0x2e1c waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" daemon prio=10 tid=0x000000000daf8000 nid=0x2d00 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Monitor Ctrl-Break" daemon prio=6 tid=0x000000000daaf000 nid=0x2eec runnable [0x000000000d5bf000] java.lang.Thread.State: RUNNABLE at com.intellij.rt.execution.application.AppMainV2.triggerControlBreak(Native Method) at com.intellij.rt.execution.application.AppMainV2.access$000(AppMainV2.java:32) at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:70) "Attach Listener" daemon prio=10 tid=0x000000000beee800 nid=0x2c54 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" daemon prio=10 tid=0x000000000bee7800 nid=0x2fd0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" daemon prio=8 tid=0x0000000002608800 nid=0x2fd8 in Object.wait() [0x000000000d1bf000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) - locked <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177) "Reference Handler" daemon prio=10 tid=0x0000000002601800 nid=0x2e30 in Object.wait() [0x000000000d06f000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:503) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) "VM Thread" prio=10 tid=0x000000000be41800 nid=0x2850 runnable "GC task thread#0 (ParallelGC)" prio=6 tid=0x0000000002555000 nid=0x24c4 runnable "GC task thread#1 (ParallelGC)" prio=6 tid=0x0000000002557000 nid=0x2d28 runnable "GC task thread#2 (ParallelGC)" prio=6 tid=0x0000000002558800 nid=0x1a58 runnable "GC task thread#3 (ParallelGC)" prio=6 tid=0x000000000255a800 nid=0x2eb8 runnable "VM Periodic Task Thread" prio=10 tid=0x000000000bf2f000 nid=0x2940 waiting on condition JNI global references: 135 Heap PSYoungGen total 37696K, used 3878K [0x00000007d5eb0000, 0x00000007d88c0000, 0x0000000800000000) eden space 32320K, 12% used [0x00000007d5eb0000,0x00000007d6279bd8,0x00000007d7e40000) from space 5376K, 0% used [0x00000007d8380000,0x00000007d8380000,0x00000007d88c0000) to space 5376K, 0% used [0x00000007d7e40000,0x00000007d7e40000,0x00000007d8380000) ParOldGen total 86144K, used 0K [0x0000000781c00000, 0x0000000787020000, 0x00000007d5eb0000) object space 86144K, 0% used [0x0000000781c00000,0x0000000781c00000,0x0000000787020000) PSPermGen total 21248K, used 3277K [0x000000077ca00000, 0x000000077dec0000, 0x0000000781c00000) object space 21248K, 15% used [0x000000077ca00000,0x000000077cd335b0,0x000000077dec0000) 2018-04-05 17:56:18 Full thread dump Java HotSpot(TM) 64-Bit Server VM (23.7-b01 mixed mode): "DestroyJavaVM" prio=6 tid=0x000000000264e000 nid=0x2c80 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "NotifyThread" prio=6 tid=0x000000000dae6800 nid=0x2ee8 waiting on condition [0x000000000e70f000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at com.smart.dao.App$2.run(App.java:41) - locked <0x00000007d600a1e0> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "WaitThread" prio=6 tid=0x000000000dc24800 nid=0x2cb4 waiting for monitor entry [0x000000000e57f000] java.lang.Thread.State: BLOCKED (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d600a1e0> (a java.lang.Object) at com.smart.dao.App$1.run(App.java:27) - locked <0x00000007d600a1e0> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "Service Thread" daemon prio=6 tid=0x000000000dafc000 nid=0x1568 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" daemon prio=10 tid=0x000000000dafb000 nid=0x2e1c waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" daemon prio=10 tid=0x000000000daf8000 nid=0x2d00 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Monitor Ctrl-Break" daemon prio=6 tid=0x000000000daaf000 nid=0x2eec runnable [0x000000000d5bf000] java.lang.Thread.State: RUNNABLE at com.intellij.rt.execution.application.AppMainV2.triggerControlBreak(Native Method) at com.intellij.rt.execution.application.AppMainV2.access$000(AppMainV2.java:32) at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:70) "Attach Listener" daemon prio=10 tid=0x000000000beee800 nid=0x2c54 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" daemon prio=10 tid=0x000000000bee7800 nid=0x2fd0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" daemon prio=8 tid=0x0000000002608800 nid=0x2fd8 in Object.wait() [0x000000000d1bf000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) - locked <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177) "Reference Handler" daemon prio=10 tid=0x0000000002601800 nid=0x2e30 in Object.wait() [0x000000000d06f000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:503) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) "VM Thread" prio=10 tid=0x000000000be41800 nid=0x2850 runnable "GC task thread#0 (ParallelGC)" prio=6 tid=0x0000000002555000 nid=0x24c4 runnable "GC task thread#1 (ParallelGC)" prio=6 tid=0x0000000002557000 nid=0x2d28 runnable "GC task thread#2 (ParallelGC)" prio=6 tid=0x0000000002558800 nid=0x1a58 runnable "GC task thread#3 (ParallelGC)" prio=6 tid=0x000000000255a800 nid=0x2eb8 runnable "VM Periodic Task Thread" prio=10 tid=0x000000000bf2f000 nid=0x2940 waiting on condition JNI global references: 135 Heap PSYoungGen total 37696K, used 3878K [0x00000007d5eb0000, 0x00000007d88c0000, 0x0000000800000000) eden space 32320K, 12% used [0x00000007d5eb0000,0x00000007d6279bd8,0x00000007d7e40000) from space 5376K, 0% used [0x00000007d8380000,0x00000007d8380000,0x00000007d88c0000) to space 5376K, 0% used [0x00000007d7e40000,0x00000007d7e40000,0x00000007d8380000) ParOldGen total 86144K, used 0K [0x0000000781c00000, 0x0000000787020000, 0x00000007d5eb0000) object space 86144K, 0% used [0x0000000781c00000,0x0000000781c00000,0x0000000787020000) PSPermGen total 21248K, used 3277K [0x000000077ca00000, 0x000000077dec0000, 0x0000000781c00000) object space 21248K, 15% used [0x000000077ca00000,0x000000077cd335b0,0x000000077dec0000) start to notify 2018-04-05 17:56:32 Full thread dump Java HotSpot(TM) 64-Bit Server VM (23.7-b01 mixed mode): "DestroyJavaVM" prio=6 tid=0x000000000264e000 nid=0x2c80 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "NotifyThread" prio=6 tid=0x000000000dae6800 nid=0x2ee8 waiting on condition [0x000000000e70f000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at com.smart.dao.App$2.run(App.java:48) - locked <0x00000007d600a1e0> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "WaitThread" prio=6 tid=0x000000000dc24800 nid=0x2cb4 waiting for monitor entry [0x000000000e57f000] java.lang.Thread.State: BLOCKED (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d600a1e0> (a java.lang.Object) at com.smart.dao.App$1.run(App.java:27) - locked <0x00000007d600a1e0> (a java.lang.Object) at java.lang.Thread.run(Thread.java:722) "Service Thread" daemon prio=6 tid=0x000000000dafc000 nid=0x1568 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" daemon prio=10 tid=0x000000000dafb000 nid=0x2e1c waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" daemon prio=10 tid=0x000000000daf8000 nid=0x2d00 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Monitor Ctrl-Break" daemon prio=6 tid=0x000000000daaf000 nid=0x2eec runnable [0x000000000d5bf000] java.lang.Thread.State: RUNNABLE at com.intellij.rt.execution.application.AppMainV2.triggerControlBreak(Native Method) at com.intellij.rt.execution.application.AppMainV2.access$000(AppMainV2.java:32) at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:70) "Attach Listener" daemon prio=10 tid=0x000000000beee800 nid=0x2c54 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" daemon prio=10 tid=0x000000000bee7800 nid=0x2fd0 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" daemon prio=8 tid=0x0000000002608800 nid=0x2fd8 in Object.wait() [0x000000000d1bf000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) - locked <0x00000007d5eb5798> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177) "Reference Handler" daemon prio=10 tid=0x0000000002601800 nid=0x2e30 in Object.wait() [0x000000000d06f000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:503) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x00000007d5eb5320> (a java.lang.ref.Reference$Lock) "VM Thread" prio=10 tid=0x000000000be41800 nid=0x2850 runnable "GC task thread#0 (ParallelGC)" prio=6 tid=0x0000000002555000 nid=0x24c4 runnable "GC task thread#1 (ParallelGC)" prio=6 tid=0x0000000002557000 nid=0x2d28 runnable "GC task thread#2 (ParallelGC)" prio=6 tid=0x0000000002558800 nid=0x1a58 runnable "GC task thread#3 (ParallelGC)" prio=6 tid=0x000000000255a800 nid=0x2eb8 runnable "VM Periodic Task Thread" prio=10 tid=0x000000000bf2f000 nid=0x2940 waiting on condition JNI global references: 135 Heap PSYoungGen total 37696K, used 3878K [0x00000007d5eb0000, 0x00000007d88c0000, 0x0000000800000000) eden space 32320K, 12% used [0x00000007d5eb0000,0x00000007d6279bd8,0x00000007d7e40000) from space 5376K, 0% used [0x00000007d8380000,0x00000007d8380000,0x00000007d88c0000) to space 5376K, 0% used [0x00000007d7e40000,0x00000007d7e40000,0x00000007d8380000) ParOldGen total 86144K, used 0K [0x0000000781c00000, 0x0000000787020000, 0x00000007d5eb0000) object space 86144K, 0% used [0x0000000781c00000,0x0000000781c00000,0x0000000787020000) PSPermGen total 21248K, used 3277K [0x000000077ca00000, 0x000000077dec0000, 0x0000000781c00000) object space 21248K, 15% used [0x000000077ca00000,0x000000077cd335b0,0x000000077dec0000) Process finished with exit code 0