1关闭防火墙
systemctl stop firewalld.service
2配置hdfs-site.xml
<?xml version="1.0"?>
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.http.address</name>
<value>0.0.0.0:50070</value>
</property>
</configuration>
3 停止-删除内存-重启
stop-all.sh
rm -rf /tmp/hadoop-centos/dfs/*
hadoop namenode -format
start-all.sh