Found one Java-level deadlock:=== "B":waiting to lock monitor 0x000000014980eec0 (object 0x000000076ac71460, a java.lang.Object),which is held by "A""A":waiting to lock monitor 0x0000000149810360 (object 0x000000076ac71470, a java.lang.Object),which is held by "B"Java stack infor...
线程A 成功获取 Monitor 线程B 等待 线程B 尝试获取 Monitor 线程B 处于等待状态 线程A 释放 Monitor 线程A 释放 Monitor 线程B 获取 Monitor 线程B 成功获取 Monitor Monitor 对象的获取过程 此外,为了理解 monitor 的数据结构,以下是一个简单的关系图。 erDiagram SynchronizedExample { +monitor: Object } Thread...
waiting to lock monitor 0x000000001c774548 (object 0x000000076bbc06f8, a java.lang.Object), which is held by "Thread-1" 回到顶部 deadlock demo及deadlock信息 上代码: importjava.util.concurrent.ConcurrentHashMap;importstaticjava.util.concurrent.TimeUnit.SECONDS;publicclassTestDeadlockMain {private...
Monitor可以理解为一个同步工具或一种同步机制,通常被描述为一个对象。每一个 Java 对象就有一把看不见的锁,称为内部锁或者Monitor锁。 在自旋锁中提到的“阻塞或唤醒一个Java线程需要操作系统切换CPU状态来完成,这种状态转换需要耗费处理器时间。如果同步代码块中的内容过于简单,状态转换消耗的时间有可能比用户代码...
监视器锁(Monitor 另一个名字叫管程)本质是依赖于底层的操作系统的 Mutex Lock(互斥锁)来实现的。 在Java 虚拟机 (HotSpot) 中,Monitor 是基于 C++ 实现的,由 ObjectMonitor 实现的, 几个关键属性: _owner:指向持有 ObjectMonitor 对象的线程 _WaitSet:存放处于 wait 状态的线程队列 _EntryList:存放处于等待锁...
FoundoneJava-leveldeadlock: === "T-ShortConn-4": waitingtolockmonitor0x00007f87e1d95718(object0x00000006cc86c090,ajava.lang.Class), whichisheldby"T-ShortConn-0" "T-ShortConn-0": waitingtolockmonitor0x00007f875c00f188(object0x00000006c6f34238,ajava.util.concurrent.ConcurrentHashMap), whic...
publicclassDeadLockTest { privatestaticObject object1 =newObject(); privatestaticObject object2 =newObject(); publicstaticvoidmain(String[] args) { newThread(newRunnable() { @Override publicvoidrun() { synchronized(object1) { System.out.println("线程1获取object1锁..."); ...
RUNNABLE"Thread-1"#11prio=5os_prio=31tid=0x00007f917c102000nid=0x4203waitingformonitor entry[0x0000700010f6b000]java.lang.Thread.State:BLOCKED(on object monitor)at com.kotlin.notes.DeadLockKt$usingSynchronized$t2$1.run(DeadLock.kt:31)-waiting to lock<0x00000007956f92b8>(a com.kotlin.notes....
Found one Java-level deadlock: === "pool-1-thread-1": waiting to lock monitor 0x000000005fcf5680 (object 0x00000007590e6b48, a sun.misc.Launcher$AppClassLoader), which is held by "main" "main": waiting to lock monitor 0x000000005fcf4180...
to lock Monitor@0x000000001f0134f8 (Object@0x00000007721d90f0, a java/lang/Object), which is held by "Thread-3" "Thread-3": waiting to lock Monitor@0x000000001f011ef8 (Object@0x00000007721d90e0, a java/lang/Object), which is held by "Thread-4" Found a total of 1 deadlock. ...