Deadlock Due to Lock Ordering in Multithreaded Java Applications

My app suddenly freezes during high concurrency. Stack traces show two threads each holding one lock and waiting for the other's lock. How do I resolve this?

Deadlocks arise when threads acquire locks in different orders, creating a circular wait. Without a fixed locking order or timeout, threads may wait forever ([turn0search4]turn0search27]). Fixes: • Enforce consistent lock acquisition order across codebase. • Prefer ReentrantLock.tryLock(timeout) to avoid blocking indefinitely. • Limit synchronized block scope. • Use high-level concurrency constructs (like StampedLock, Semaphore, or ExecutorService) to manage resource access more transparently.