add some more rescue nils
add some more rescue nils

zk-ruby/zookeeper,songling88/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,songling88/zookeeper,rickypai/zookeeper,rickypai/zookeeper,songling88/zookeeper,songling88/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper