vi /etc/hosts 配置集羣內主機的域名映射注意問題

linux虛擬機內集羣報錯：java.net.ConnectException: Connection refused， 2019-03-18 15:18:15,750 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in offerService java.io.EOFException: End of File

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