hadoop成功搭建,可以运行hadoop自带的wordcount程序。但自己在运行时出现下面的错误。
log4j:WARN No appenders could be found for logger (org.apache.hadoop.util.Shell).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.


