jdk查看程序是否有死锁

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最新推荐文章于 2025-05-27 15:37:51 发布

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分类专栏：小技巧文章标签： jdk 死锁

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通过CMD进入JDK的bin目录，使用jps命令获取Test类的进程ID（如23720），接着运行jstack命令，揭示了程序存在死锁问题。

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cmd命令下进入jdk所在文件夹下的bin文件夹下

输入jps命令

找到正在执行的类Test的pid 23720，执行jstack命令

E:\develop\Java\JDK1.8\jdk1.8.0_171\bin>jps
21892
24484 Jps
23720 Test
24872 Launcher
4520 Launcher

E:\develop\Java\JDK1.8\jdk1.8.0_171\bin>jstack -l 23720
2019-07-09 14:40:31
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.171-b11 mixed mode):

"DestroyJavaVM" #13 prio=5 os_prio=0 tid=0x0000000002aec000 nid=0x1a58 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"Thread-1" #12 prio=5 os_prio=0 tid=0x000000001a048000 nid=0x34c waiting for monitor entry [0x000000001b19f000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at com.zjxt.demo.test.thread.test9.DeadThread.run(DeadThread.java:40)
        - waiting to lock <0x00000000d645da78> (a java.lang.Object)
        - locked <0x00000000d645da88> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Thread-0" #11 prio=5 os_prio=0 tid=0x0000000019f1e000 nid=0x342c waiting for monitor entry [0x000000001b09f000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at com.zjxt.demo.test.thread.test9.DeadThread.run(DeadThread.java:26)
        - waiting to lock <0x00000000d645da88> (a java.lang.Object)
        - locked <0x00000000d645da78> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:748)

   Locked ownable synchronizers:
        - None

"Service Thread" #10 daemon prio=9 os_prio=0 tid=0x0000000019dcf000 nid=0x4b40 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"C1 CompilerThread2" #9 daemon prio=9 os_prio=2 tid=0x0000000019b4c000 nid=0x2160 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"C2 CompilerThread1" #8 daemon prio=9 os_prio=2 tid=0x0000000019ad5000 nid=0x434 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"C2 CompilerThread0" #7 daemon prio=9 os_prio=2 tid=0x0000000019ad4000 nid=0x4c28 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"Monitor Ctrl-Break" #6 daemon prio=5 os_prio=0 tid=0x0000000019b4a800 nid=0x2cbc runnable [0x000000001aa9e000]
   java.lang.Thread.State: RUNNABLE
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
        at java.net.SocketInputStream.read(SocketInputStream.java:171)
        at java.net.SocketInputStream.read(SocketInputStream.java:141)
        at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
        at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
        - locked <0x00000000d64c1300> (a java.io.InputStreamReader)
        at java.io.InputStreamReader.read(InputStreamReader.java:184)
        at java.io.BufferedReader.fill(BufferedReader.java:161)
        at java.io.BufferedReader.readLine(BufferedReader.java:324)
        - locked <0x00000000d64c1300> (a java.io.InputStreamReader)
        at java.io.BufferedReader.readLine(BufferedReader.java:389)
        at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:64)

   Locked ownable synchronizers:
        - None

"Attach Listener" #5 daemon prio=5 os_prio=2 tid=0x0000000017852000 nid=0x5cac waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"Signal Dispatcher" #4 daemon prio=9 os_prio=2 tid=0x000000001783d000 nid=0x5c18 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"Finalizer" #3 daemon prio=8 os_prio=1 tid=0x0000000017814800 nid=0x2cac in Object.wait() [0x0000000018b6f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000d5e08ed0> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
        - locked <0x00000000d5e08ed0> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:212)

   Locked ownable synchronizers:
        - None

"Reference Handler" #2 daemon prio=10 os_prio=2 tid=0x0000000002bde000 nid=0x4d08 in Object.wait() [0x0000000018a6e000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000d5e06bf8> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:502)
        at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
        - locked <0x00000000d5e06bf8> (a java.lang.ref.Reference$Lock)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

   Locked ownable synchronizers:
        - None

"VM Thread" os_prio=2 tid=0x00000000177e8000 nid=0x5ac8 runnable

"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x0000000002b05800 nid=0x2d28 runnable

"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x0000000002b07000 nid=0x3cb0 runnable

"GC task thread#2 (ParallelGC)" os_prio=0 tid=0x0000000002b08800 nid=0x4fc0 runnable

"GC task thread#3 (ParallelGC)" os_prio=0 tid=0x0000000002b0a000 nid=0x3048 runnable

"VM Periodic Task Thread" os_prio=2 tid=0x0000000019de2800 nid=0x4dc4 waiting on condition

JNI global references: 12


Found one Java-level deadlock:
=============================
"Thread-1":
  waiting to lock monitor 0x00000000178141c8 (object 0x00000000d645da78, a java.lang.Object),
  which is held by "Thread-0"
"Thread-0":
  waiting to lock monitor 0x0000000017810128 (object 0x00000000d645da88, a java.lang.Object),
  which is held by "Thread-1"

Java stack information for the threads listed above:
===================================================
"Thread-1":
        at com.zjxt.demo.test.thread.test9.DeadThread.run(DeadThread.java:40)
        - waiting to lock <0x00000000d645da78> (a java.lang.Object)
        - locked <0x00000000d645da88> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:748)
"Thread-0":
        at com.zjxt.demo.test.thread.test9.DeadThread.run(DeadThread.java:26)
        - waiting to lock <0x00000000d645da88> (a java.lang.Object)
        - locked <0x00000000d645da78> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:748)

Found 1 deadlock.

发现有死锁