Thread dump example

2011-04-12 09:18:25
Full thread dump OpenJDK 64-Bit Server VM (19.0-b09 mixed mode):

"Attach Listener" daemon prio=10 tid=0x0000000000b0d000 nid=0x33ef waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"DestroyJavaVM" prio=10 tid=0x00007f3a2408d000 nid=0x3391 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"File I/O" prio=10 tid=0x00007f3a2408b800 nid=0x33a2 runnable [0x00007f3a3157e000]
   java.lang.Thread.State: RUNNABLE
 at java.io.FileInputStream.read(Native Method)
 at ThreadDumpTest$4.run(ThreadDumpTest.java:97)
 at java.lang.Thread.run(Thread.java:636)

"Blocked" prio=10 tid=0x00007f3a24081000 nid=0x33a1 waiting for monitor entry [0x00007f3a3167f000]
   java.lang.Thread.State: BLOCKED (on object monitor)
 at ThreadDumpTest$3.run(ThreadDumpTest.java:74)
 - waiting to lock <0x00000007d68b4068> (a java.lang.Object)
 at java.lang.Thread.run(Thread.java:636)

"Blocking" prio=10 tid=0x00007f3a2407f000 nid=0x33a0 in Object.wait() [0x00007f3a31780000]
   java.lang.Thread.State: WAITING (on object monitor)
 at java.lang.Object.wait(Native Method)
 - waiting on <0x00000007d69de280> (a java.lang.Object)
 at java.lang.Object.wait(Object.java:502)
 at ThreadDumpTest$2.run(ThreadDumpTest.java:52)
 - locked <0x00000007d69de280> (a java.lang.Object)
 - locked <0x00000007d68b4068> (a java.lang.Object)
 at java.lang.Thread.run(Thread.java:636)

"Waiting" prio=10 tid=0x00007f3a2407e000 nid=0x339f in Object.wait() [0x00007f3a31881000]
   java.lang.Thread.State: WAITING (on object monitor)
 at java.lang.Object.wait(Native Method)
 - waiting on <0x00000007d693ee00> (a java.lang.Object)
 at java.lang.Object.wait(Object.java:502)
 at ThreadDumpTest$1.run(ThreadDumpTest.java:26)
 - locked <0x00000007d693ee00> (a java.lang.Object)
 at java.lang.Thread.run(Thread.java:636)

"Low Memory Detector" daemon prio=10 tid=0x00007f3a24001000 nid=0x339d runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"CompilerThread1" daemon prio=10 tid=0x0000000000b93000 nid=0x339c waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"CompilerThread0" daemon prio=10 tid=0x0000000000b90000 nid=0x339b waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" daemon prio=10 tid=0x0000000000b8e800 nid=0x339a runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" daemon prio=10 tid=0x0000000000b6f000 nid=0x3398 in Object.wait() [0x00007f3a31dc5000]
   java.lang.Thread.State: WAITING (on object monitor)
 at java.lang.Object.wait(Native Method)
 - waiting on <0x00000007d6801310> (a java.lang.ref.ReferenceQueue$Lock)
 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133)
 - locked <0x00000007d6801310> (a java.lang.ref.ReferenceQueue$Lock)
 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149)
 at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177)

"Reference Handler" daemon prio=10 tid=0x0000000000b67800 nid=0x3397 in Object.wait() [0x00007f3a31ec6000]
   java.lang.Thread.State: WAITING (on object monitor)
 at java.lang.Object.wait(Native Method)
 - waiting on <0x00000007d68011e8> (a java.lang.ref.Reference$Lock)
 at java.lang.Object.wait(Object.java:502)
 at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
 - locked <0x00000007d68011e8> (a java.lang.ref.Reference$Lock)

"VM Thread" prio=10 tid=0x0000000000b60800 nid=0x3396 runnable 

"GC task thread#0 (ParallelGC)" prio=10 tid=0x0000000000b03000 nid=0x3392 runnable 

"GC task thread#1 (ParallelGC)" prio=10 tid=0x0000000000b05000 nid=0x3393 runnable 

"GC task thread#2 (ParallelGC)" prio=10 tid=0x0000000000b07000 nid=0x3394 runnable 

"GC task thread#3 (ParallelGC)" prio=10 tid=0x0000000000b08800 nid=0x3395 runnable 

"VM Periodic Task Thread" prio=10 tid=0x00007f3a2400c000 nid=0x339e waiting on condition 

JNI global references: 869

import java.io.FileInputStream;
import java.util.concurrent.atomic.AtomicInteger;

public class ThreadDumpTest
{
  static final Object o = new Object();

  /**
   * @param args
   */
  public static void main(String[] args)
  {
    new Thread(new Runnable()
      {
        @Override
        public void run()
        {
          Thread.currentThread().setName("Waiting");
          // Waiting
          try
          {
            System.out.println("Waiting");
            Object x = new Object();
            synchronized (x)
            {
              x.wait();              
            }
          }
          catch (InterruptedException e)
          {
            e.printStackTrace();
          }
          System.out.println("Finished waiting");
        }
      }).start();

    new Thread(new Runnable()
      {
        @Override
        public void run()
        {
          Thread.currentThread().setName("Blocking");
          // Blocking
          synchronized (o)
          {
            try
            {
              System.out.println("Blocking");
              Object x = new Object();
              synchronized (x)
              {
                x.wait();              
              }
            }
            catch (InterruptedException e)
            {
              e.printStackTrace();
            }
            System.out.println("Finished blocking");
          }
        }
      }).start();

    new Thread(new Runnable()
      {
        @Override
        public void run()
        {
          Thread.currentThread().setName("Blocked");
          // Blocked
          System.out.println("Getting blocked");
          synchronized (o)
          {
            System.out.println(Thread.currentThread().getName() + ": should have been blocked");
          }
        }
      }).start();

    new Thread(new Runnable()
      {
        final AtomicInteger sum = new AtomicInteger();

        @Override
        public void run()
        {
          // File I/O
          Thread.currentThread().setName("File I/O");
          FileInputStream fis;
          try
          {
            fis = new FileInputStream("/home/tcollinsworth/Desktop/elekta-crash-1/jboss-elekta-1.trace");
            System.out.println("Reading file");
            int inByte = 0;
            do
            {
              sum.addAndGet(inByte);
              inByte = fis.read();
            }
            while (inByte != -1);
            System.out.println("Finished reading file");
          }
          catch (Exception e)
          {
            e.printStackTrace();
          }
        }
      }).start();
  }
}