hadoop成功搭建,可以運行hadoop自帶的wordcount程式。但自己在運行時出現下面的錯誤。
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.


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