![]() ![]() If another thread tries to execute the method, it will go into a BLOCKED state until the first thread completes executing the method. When a method is synchronized, only one thread that has the lock of that object can execute that method. If you notice, both ‘ CoolObject#method1()’ and ‘ HotObject#method2()’ are synchronized methods. Similarly, the ‘ run()’ method in ‘ ThreadB’ invokes ‘ HotObject#method2()’. The ‘ run()’ method in ‘ ThreadA’ invokes ‘ CoolObject#method1()’. In this method, two threads with the names ‘ ThreadA’ and ‘ ThreadB’ are launched. Notice the sample program contains the ‘ DeadLockDemo’ class. Here is a sample program from the open-source BuggyApp application, which generates deadlock between two threads. The only way to recover from a deadlock is to restart the application. ![]() Once a deadlock happens in an application, it can not be recovered. On the other hand, when Train-B is in part-4, it will be stuck waiting for part-3, which Train-A holds. When Train-A is in part-3 of the train track, it will be stuck waiting for part-4 of the track, which Train-B holds. Under this circumstance, Train-A and Train-B will reach a deadlock state when they reach part-3 and part-4 of the train track. Let’s say both trains travel at the same speed. Let’s say Train-A starts at part-1 and Train-B starts at Part-6 on the same train track at the same time. Let’s say there is only one train track and this train track has six parts (part-1, part-2, part-3, part-4, part-5, part-6). Here is a practical example that may help you understand deadlocks. The technical definition of a ‘deadlock’ is a situation where a set of processes are blocked because each process is holding a resource and waiting for another resource acquired by some other process. What Is a Deadlock?ĭeadlocks tend to happen in multi-threaded applications. In this post, let’s discuss how to simulate deadlock. In this series of chaos engineering articles, we have been learning to simulate various performance problems. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |