周末机房断电,然后hadoop爆出如题的错误,解决方案就是关闭所有节点的防火墙,相关命令如下:

查看防火墙状态:
/etc/init.d/iptables status
暂时关闭防火墙:
/etc/init.d/iptables stop
禁止防火墙在系统启动时启动
/sbin/chkconfig --level iptables off
重启iptables:
/etc/init.d/iptables restart

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