What are common mistakes developers make with CyclicBarrier?

CyclicBarrier is a useful synchronization aid for coordinating multiple threads in Java applications. However, developers often make common mistakes when using it. Here are some of those pitfalls:

  • Not Handling InterruptedException: Threads waiting at the barrier can be interrupted. Failing to handle InterruptedException can cause issues or lead to deadlock.
  • Incorrect Count: Setting the number of parties incorrectly can lead to premature or hanging threads. Ensure that the count matches the expected number of threads.
  • Forgetting to Reset: Not using the reset() method after the barrier is tripped can lead to confusing behavior in subsequent cycles.
  • Assuming All Threads Reach the Barrier: If one of the threads never reaches the barrier due to an exception or a logic error, it can cause all other threads to wait indefinitely.
  • Debugging Issues: Not logging or debugging the state of threads waiting at the barrier can make it difficult to diagnose issues.

keywords: java CyclicBarrier synchronization multithreading common mistakes