Deadlock Caused by Synchronized Block Ordering

Occasionally threads in my Java app hang without warning. Stack traces show each waiting on a lock held by the other. What's causing this deadlock and how can I resolve it?

Deadlocks arise when two or more threads acquire locks in different orders, causing a circular wait condition. Java synchronization allows only one thread per monitor at a time, so improper lock ordering can cause threads to wait forever ([turn0search2]turn0search7). Fix: • Acquire locks in a consistent global order across all threads. • Use Lock.tryLock(timeout, ...) from java.util.concurrent.locks to avoid deadlock by timing out. • Minimize the scope of synchronized blocks and avoid nested locking where possible. • Use StampedLock or optimistic locking where high concurrency is expected.