java定位死锁的三种方法（jstack、Arthas和Jvisualvm）

第java定位死锁的三种方法（jstack、Arthas和Jvisualvm）"DestroyJavaVM"#13prio=5os_prio=31tid=0x00007f9a1d8fe800nid=0xd03waitingoncondition[0x0000000000000000]

java.lang.Thread.State:RUNNABLE

Lockedownablesynchronizers:

-None

"pool-1-thread-2"#12prio=5os_prio=31tid=0x00007f9a1d8fe000nid=0xa703waitingoncondition[0x000070000ff8e000]

java.lang.Thread.State:WAITING(parking)

atsun.misc.Unsafe.park(NativeMethod)

-parkingtowaitfor0x0000000795768cd8(ajava.util.concurrent.locks.ReentrantLock$NonfairSync)

atjava.util.concurrent.locks.LockSupport.park(LockSupport.java:175)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)

atjava.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)

atjava.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)

atcom.coco.util.SlideTimeUnit.lambda$main$1(SlideTimeUnit.java:63)

atcom.coco.util.SlideTimeUnit$$Lambda$2/565760380.run(UnknownSource)

atjava.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

atjava.util.concurrent.FutureTask.run(FutureTask.java:266)

atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

atjava.lang.Thread.run(Thread.java:748)

Lockedownablesynchronizers:

-0x0000000795768d08(ajava.util.concurrent.locks.ReentrantLock$NonfairSync)

-0x0000000795a9e4e0(ajava.util.concurrent.ThreadPoolExecutor$Worker)

"pool-1-thread-1"#11prio=5os_prio=31tid=0x00007f9a2082c800nid=0xa803waitingoncondition[0x000070000fe8b000]

java.lang.Thread.State:WAITING(parking)

atsun.misc.Unsafe.park(NativeMethod)

-parkingtowaitfor0x0000000795768d08(ajava.util.concurrent.locks.ReentrantLock$NonfairSync)

atjava.util.concurrent.locks.LockSupport.park(LockSupport.java:175)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)

atjava.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)

atjava.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)

atcom.coco.util.SlideTimeUnit.lambda$main$0(SlideTimeUnit.java:49)

atcom.coco.util.SlideTimeUnit$$Lambda$1/596512129.run(UnknownSource)

atjava.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

atjava.util.concurrent.FutureTask.run(FutureTask.java:266)

atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

atjava.lang.Thread.run(Thread.java:748)

Lockedownablesynchronizers:

-0x0000000795768cd8(ajava.util.concurrent.locks.ReentrantLock$NonfairSync)

-0x0000000795a9ba28(ajava.util.concurrent.ThreadPoolExecutor$Worker)

"ServiceThread"#10daemonprio=9os_prio=31tid=0x00007f9a2082c000nid=0x4103runnable[0x0000000000000000]

java.lang.Thread.State:RUNNABLE

Lockedownablesynchronizers:

-None

"C1CompilerThread3"#9daemonprio=9os_prio=31tid=0x00007f9a1e021800nid=0x3f03waitingoncondition[0x0000000000000000]

java.lang.Thread.State:RUNNABLE

2：通过Arthas工具定位死锁

2.1:下载好Arthas的jar,然后运行

有一个thread-b就可以查看到死锁信息

[arthas@4182]$thread-b

"pool-1-thread-2"Id=12WAITINGonjava.util.concurrent.locks.ReentrantLock$NonfairSync@2cb8a9a3ownedby"pool-1-thread-1"Id=11

atsun.misc.Unsafe.park(NativeMethod)

-waitingonjava.util.concurrent.locks.ReentrantLock$NonfairSync@2cb8a9a3

atjava.util.concurrent.locks.LockSupport.park(LockSupport.java:175)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)

atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)

atjava.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)

atjava.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)

atcom.coco.util.SlideTimeUnit.lambda$main$1(SlideTimeUnit.java:63)

atcom.coco.util.SlideTimeUnit$$Lambda$2/565760380.run(UnknownSource)

atjava.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

atjava.util.concurrent.FutureTask.run(FutureTask.java:266)

atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

atjava.lang.Thread.run(Thread.java:748)

Numberoflockedsynchronizers=2

-java.util.concurrent.ThreadPoolExecutor$Worker@6433a2

-java.util.concurrent.locks.ReentrantLock$NonfairSync@3a855d13----butblocks1otherthreads!

3.