使用curator做为zk客户端，zookeeper宕机重启后无法自动重连

[YanXs]

使用curator客户端时，当zookeeper宕机重启后会产生一个None类型的event，在重连时调用CuratorZookeeperClient类的内部类CuratorWatcherImpl的process方法时会陷入死循环，RetryLoop的方法callWithRetry的while循环中。
修改方式升级curator到apache版本，或者在CuratorWatcherImpl的process方法中加入事件类型判断，只对NodeChildrenChanged事件响应

[0915240]

another : #38

zk 异常：
2017-01-07 15:48:30,738 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /192.168.137.1:55990 (no session established for client) 2017-01-07 15:48:32,424 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from /192.168.137.1:55991

[htynkn]

Verify this with:

1. dubbo 2.6.2
2. zookeeper 3.4.12
3. curator-framework 2.12.0

All good. If you try latest version and still able to reproduce issue, please provide full error log.

[htynkn]

No more update. Close this issue.