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zookeeper 实现分布式锁安全用法-王清培
source link: http://blog.51cto.com/wangqingpei557/2346830
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背景ConnectionLoss链接丢失SessionExpired会话过期绕开zookeeperbroker进行状态通知leader选举与zkNode断开做好幂等静态扩容、动态扩容背景分布式锁现在用的越来越多，通常用来协调多个并发任务。在一般的应用场景中存在一定的不安全用法，不安全用法会带来多个master在并行执行，业务或数据可能存在重复计算带来的副作用，在没有拿到lock的情况下扮演者mas
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