使用SimpleDateFormat来实现格式化日期 import java.text.SimpleDateFormat; import java.util.Date; public class DateFormatExample { public static void main(String args[]) { Date today = new Date(); System.out.println("今天 is : " + today); SimpleDateFormat DATE
hadoop namenode -format多次格式化后,datanode启动不了 org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/beifeng/core-site.xml._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and