hadoop进入退出安全模式

查看状态

bin/hdfs dfsadmin -safemode get

进入安全模式

[root@master hadoop]# bin/hdfs dfsadmin -safemode enter 19/11/03 05:24:20 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Safe mode is ON

退出安全模式

[root@master hadoop]# bin/hdfs dfsadmin -safemode leave 19/11/03 05:24:30 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Safe mode is OFF

修改配置文件

也可修改安全阀值 修改hdfs-site.xml

设置安全阀值属性，属性值默认为0.999f，如果设为1则不进行安全检查， 大于1将永久的处于安全模式

<property> <name>dfs.safemode.threshold.pct</name> <value>0.999f</value> <description> Specifies the percentage of blocks that should satisfy the minimal replication requirement defined by dfs.replication.min. Values less than or equal to 0 mean not to wait for any particular percentage of blocks before exiting safemode. Values greater than 1 will make safe mode permanent. </description> </property>