运行hadoop程序时， 中途我把它终止了，然后再向hdfs加文件或删除文件时，出现Name node is in safe mode错误：rmr: org.apache.hadoop.dfs.SafeModeException: Cannot delete /user/hadoop/input. Name node is in safe mode解决的命令：bin/hadoo...

前些天在csdn上看到有人说dianping.com上的东西没法抓取，我就用htmlparser试了试，果然不行。看返回结果Server returned HTTP response code: 500 for URL: http://www.dianping.com/shop/2212912不能使用:然后想到换httpclient来试试:HttpClient hc=new Htt...