ES 6.3.2 index 操作源码流程 client 发送请求 TransportBulkAction#doExecute(Task,BulkRequest,listener) 解析请求,是否要自动创建索引?请求中 是否有mapping信息? TransportBulkAction#doRun() 获取集群的状态信息 /** sets the last observed state to the currently applied cluster state and returns it *