deadlock « Operation « Java Thread Q&A

1. How to kill deadlocked threads in Java?    stackoverflow.com

I'd like to kill threads that are stuck in deadlock state. First, we can detect thread ids in deadlock state using the findDeadlockedThreads() method of the ThreadMXBean class in java.lang.management. Then, ...

2. Will this code not result in a deadlock? Java Threads locking    stackoverflow.com

So the thing is, I want to be able to do this with my class. object.lockAccess(); object.doSomething(); object.doAnotherThing(); object.doAnotherThingYet(); object.unlockAccess(); So the other thread will not be able to access my class methods while locked. Here is the ...

3. System.out.println eventually blocks    stackoverflow.com

I have an application that consolidates all of its logging into a single-instance class in order to facilitate selective debug printing etc. The class has been around for a year or ...

4. Reentrant lock and deadlock with Java    stackoverflow.com

Can someone explain to me how Reentrant lock and deadlock relate to each other with Java code (pseudo) example?

5. Deadlock caused by thread.join() in a static block    stackoverflow.com

I came across a deadlock scenario which can be summarized as the StaticDeadlock class shown below. This simple program will freeze at o.getClass(). Here's my speculation of what happened, ...

6. Program hangs if thread is created in static initializer block    stackoverflow.com

I have come across a situation where my program hangs, looks like deadlock. But I tried figuring it out with jconsole and visualvm, but they didn't detect any deadlock. Sample code:

public ...

7. How to avoid an easily made deadlock?    stackoverflow.com

I have an object User with two locks, inventoryLock and currencyLock. Often these locks will be used individually, e.g.

synchronized (user.inventoryLock) {

 // swap items
 tmp = user.inventory[x];
 user.inventory[x] = user.inventory[y];
 user.inventory[y] ...

8. Get deadlock detection from running programm or dump in Java    stackoverflow.com

I have a piece of running java software that is jammed. I would like to get a view inside but have got no idea how to do that. Is there some tool ...

9. why does the following code result in deadlock    stackoverflow.com

I have the following class

public class LockTester implements Runnable{
 private static Locker locker = new Locker();

 public static void main(String[] args){
  for(int i=0;i<10;i++){
   Thread t = new Thread(new ...

10. Deadlocks...which threads are locked?    java-forums.org

Deadlocks...which threads are locked? This program detects deadlocks; the error message reads "Thread-1", does that mean that thread one raised an exception after thread two tried to grab a? Is there a way of knowing this? Output: thread one grab a Waiting For Lock Got New Lock thread two grab b Waiting For Lock Got New Lock thread one ...

11. Lock problem with three threads.... Deadlock    forums.oracle.com

I am having somewhat odd behavior and I am wondering if I do not understand exactly how locks work. So I have a class that tries to create a few different files and zip them then store them in a directory. The first thing it does it is call an a file generator which must do a lot of copying. To ...