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MapReduce, mail # user - how to handle the corrupt block in HDFS?


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how to handle the corrupt block in HDFS?
ch huang 2013-12-10, 00:32
hi,maillist:
            my nagios alert me that there is a corrupt block in HDFS all
day,but i do not know how to remove it,and if the HDFS will handle this
automaticlly? and if remove the corrupt block will cause any data
lost?thanks