xyuanlu

### Describe the bug While running chaos tests for metaclient, we notice sometimes puppy implementation hang after test finish. This is because we only catch interrupt exception while `sleep()` but...

race condition in ZkClient may leave untracked watcher on ZK

1

### Describe the bug ``` public ChildrenSubscribeResult subscribeChildChanges(String path, IZkChildListener listener, boolean skipWatchingNonExistNode) { synchronized (_childListener) { Set listeners = _childListener.get(path); if (listeners == null) { listeners = new CopyOnWriteArraySet();...

### Describe the bug User reporting that when they make heap dump on an app that uses leader election client for leadership orchestration, the participant ZNode is gone. The node...