What is “Locked ownable synchronizers” in thread dump?

Question

I am trying to understand what does Locked ownable synchronizers refer to in a thread dump?

I started using ReentrantReadWriteLock have a thread in WA

Answer 1

From Java 7 documentation:

An ownable synchronizer is a synchronizer that may be exclusively owned by a thread and uses AbstractOwnableSynchronizer (or its subclass) to implement its synchronization property. ReentrantLock and ReentrantReadWriteLock are two examples of ownable synchronizers provided by the platform.