分布式系统datanode无法启动的报java.io.IOException: All specified directories are failed to load.
--java.io.IOException:Allspecifieddirectoriesarefailedtoload.概要2018-04-1801:52:54,822INFOorg.apache.hadoop.ipc.Server:IPCServerlisteneron50020:starting2018-04-1801:52:55,289INFOorg.apache.hadoop.hdfs.