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解决方案:
/etc/sysconfig/network
/etc/hosts
$hostname
这三处的主机名都要一样。
具体参考:http://blog.itpub.net/28254374/viewspace-1059607/
hadoop报错:WARN mapred.JobClient: Error reading task outputNo route to host
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原文地址:http://www.cnblogs.com/michaellau/p/4430388.html