Race condition are cause of some subtle programming bugs when Java programs are exposed to concurrent execution environment. As name suggests, race condition occurs due to race between multiple threads, if a thread which is supposed to execute first lost the race and executed second, behaviour of code changes, which surface as non-deterministic bugs. This is one of the hardest bugs to find and re-produce because of random nature of racing between threads. One example of race condition is out-of-order processing,
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