Java Thread State: WAITING (parking) Explained

This means that the thread is currently waiting for some event to occur and has been put into a 'parking' state by the JVM. This could happen when a thread is waiting for another thread to release a lock or when it is waiting for input/output operations to complete. The thread will remain in the waiting state until the event it is waiting for occurs, at which point it will be moved to a different state (such as running or blocked).