handle fork() case, dispatcher thread may be dead
handle fork() case, dispatcher thread may be dead

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