I will not describe here a complex concurrency problem, but a simple problem that you may face it if you use CountDownLatch careless.Īssume you have 2 threads (Thread-1 and Thread-2) that share a single and you want to synchronize them using a CountDownLatch. Deadlock in java is a programming situation where two or more threads are blocked forever. And as concurrency use cases can be very complex, developers must be very careful. deadlock operating-system threading producer-consumer scheduling-algorithms. Deadlocks can occur in Java when the synchronized keyword causes the executing thread to block while waiting to get the lock, associated with the specified. Since, both threads are waiting for each other to release the lock, the condition is. The programs featured here are all written in Java, and present examples of threading and Operating System related algorithms (example: scheduling and deadlock). Deadlock can occur in a situation when a thread is waiting for an object lock, that is acquired by another thread and second thread is waiting for an object lock that is acquired by first thread. CountDownLatch can save your time in suitable cases and you have to be aware of this class.Īs always synchronization of threads can raise deadlocks if code is not good. Description Wikipedia aptly defines deadlock is a situation in which two or more competing actions are each waiting for the other to finish, and thus neither ever does. The simplest example is where Thread A locks Object A and then attempts to lock Object B, while another Thread B has Object B locked and is waiting to lock. Solution to the deadlock problem is: one is synchronized, one is to use explicit locks for Lock. Deadlock in Java is a part of multithreading. It’s a very convenience class to achieve synchronization between two or more threads, where allows one or more threads to wait until a set of operations being performed in other threads completes (check javadoc and this post).
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